Exhibit 10.2
     AMENDMENT NO. 1 dated as of June 3, 2009 (this “Amendment”), to the Credit
Agreement dated as of August 8, 2008 (as amended, supplemented or otherwise
modified through the date hereof, the “Credit Agreement”), among Quicksilver
Resources Inc., a Delaware corporation (the “Borrower”), the Lenders from time
to time party thereto and Credit Suisse, Cayman Islands Branch, as the
Administrative Agent.
          WHEREAS, pursuant to the Credit Agreement, the Lenders have made Loans
to the Borrower;
          WHEREAS, the Borrower has informed the Administrative Agent that it
desires to refinance all or a portion of the Loans outstanding under the Credit
Agreement with the proceeds of an offering and sale of new senior notes of the
Borrower (the “New Senior Notes”);
          WHEREAS, the Borrower has requested that, in the event the Loans
outstanding under the Credit Agreement are refinanced with the proceeds of the
New Senior Notes in part but not in full, the Credit Agreement and the other
Loan Documents be amended (a) to permit the issuance of the New Senior Notes,
and the grant of a security interest in the Collateral to secure the obligations
of the Borrower and the Subsidiaries under the New Senior Notes, and (b) to
effect such other amendments as are set forth herein; and
          WHEREAS, the Lenders party hereto, which represent at least the
Required Lenders, are willing to agree to such amendments on the terms and
subject to the conditions set forth herein.
          NOW, THEREFORE, in consideration of the mutual agreements herein
contained and other good and valuable consideration, the sufficiency and receipt
of which are hereby acknowledged, the parties hereto hereby agree as follows:
          SECTION 1. Defined Terms. Capitalized terms used but not otherwise
defined herein (including in the recitals hereto) have the meanings assigned to
them in the Credit Agreement.
          SECTION 2. Amendments to the Credit Agreement. (a) Section 1.01 of the
Credit Agreement is hereby amended as follows:
     (i) The following new defined terms are inserted in the appropriate
alphabetical order:
          “First Amendment” means the Amendment No. 1 dated as of June 3, 2009,
to this Agreement.
          “First Amendment Effective Date” has the meaning given to the term
“Amendment Effective Date” in the First Amendment.

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2

          “New Senior Notes” means senior notes of the Borrower issued on or
after the First Amendment Effective Date, and the Indebtedness represented
thereby.
          “New Senior Notes Documents” means the New Senior Notes, the New
Senior Notes Indenture and all promissory notes, guarantees and other documents,
instruments and agreements executed and delivered pursuant to the New Senior
Notes Indenture evidencing, guaranteeing or otherwise pertaining to the New
Senior Notes, other than any Security Documents.
          “New Senior Notes Indenture” means that certain Indenture dated as of
December 22, 2005, between the Borrower and The Bank of New York Mellon Trust
Company, N.A. (as successor in interest), as trustee (or any successor trustee),
as supplemented by a Supplemental Indenture to be entered into in connection
with the issuance of the New Senior Notes.
     (ii) The following defined terms are hereby amended and restated in their
entirety as follows:
          “Alternate Base Rate” means, for any day, a rate per annum equal to
the greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds
Effective Rate in effect on such day plus 1/2 of 1%, (c) the Adjusted Eurodollar
Rate for a one month Interest Period on such day (or if such day is not a
Business Day, the immediately preceding Business Day) plus 1% (provided that,
for the avoidance of doubt, the Adjusted Eurodollar Rate for any day shall be
based on the British Bankers’ Association LIBOR rate for deposits in U.S.
Dollars as reported by any generally recognized financial information service at
approximately 11:00 a.m., London time, on such day) and (d) 4.25%. Any change in
the Alternate Base Rate due to a change in the Prime Rate, the Federal Funds
Effective Rate or the Adjusted Eurodollar Rate shall be effective on the
effective date of such change in the Prime Rate, the Federal Funds Effective
Rate or the Adjusted Eurodollar Rate, as the case may be. If the Administrative
Agent shall have determined (which determination shall be conclusive and
binding, absent manifest error) that it is unable to ascertain the Federal Funds
Effective Rate for any reason, including the inability or failure of the
Administrative Agent to obtain sufficient quotations in accordance with the
terms of the definition of such term, the Alternate Base Rate shall be
determined without regard to clause (b) of the preceding sentence until the
circumstances giving rise to such inability no longer exist.
          “Applicable Margin” means, for any day, (a) with respect to any
Eurodollar Loan, 4.50% per annum, and (b) with respect to any ABR Loan, 3.50%
per annum, in each case plus an Incremental Applicable Margin, if any,
applicable on such day; provided, however, that, after June 30, 2009, the term
“Applicable Margin” shall mean (i) with respect to any Eurodollar Loan, 7.00%
per annum, and (ii) with respect to any ABR Loan, 6.00% per annum, in each case
plus an Incremental Applicable Margin, if any, applicable on such day.

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3

          “Existing Notes” means the Existing Convertible Debentures, the
Existing Senior Notes, the Existing Subordinated Notes and the New Senior Notes.
          “Existing Notes Documents” means the Existing Convertible Debentures
Documents, the Existing Senior Notes Documents, the Existing Subordinated Notes
Documents and the New Senior Notes Documents.
          “Existing Notes Indentures” means the Existing Convertible Debentures
Indenture, the Existing Senior Notes Indenture, the Existing Subordinated Notes
Indenture and the New Senior Notes Indenture.
     (iii) The defined term “Prepayment Event” is hereby amended by amending and
restating clause (d) thereof in its entirety as follows: “(d) the incurrence by
the Borrower or any other Credit Party of any Permitted Subordinated
Indebtedness or any New Senior Notes; or”.
          (b) Section 1.03 of the Credit Agreement is hereby amended by adding
the following sentence at the end thereof:
“Notwithstanding any other provision contained herein, all terms of an
accounting or financial nature used herein shall be construed, and all
computations of amounts and ratios referred to herein shall be made, without
giving effect to any election under Statement of Financial Accounting Standards
No. 159 (and any other Financial Accounting Standard having a similar result or
effect) to value any Indebtedness or other liabilities of the Borrower or any
Subsidiary at “fair value”, as defined therein.”
          (c) Section 2.10 of the Credit Agreement is hereby amended by (i) the
designation of the existing paragraph thereof as paragraph “(a)” and (ii) the
insertion of the a new paragraph at the end thereof as follows:
   “(b) The Borrower agrees to pay to the Administrative Agent, for the account
of each Lender, a fee (the “Duration Fee”) equal to 0.50% of the aggregate
principal amount of the Loans of such Lender outstanding on June 30, 2009. The
Duration Fees shall be payable on the first Business Day following June 30,
2009, in immediately available funds, and shall not be refundable under any
circumstances absent manifest error (e.g., as a result of a clerical mistake).”
          (d) Section 6.03 of the Credit Agreement is hereby amended and
restated in its entirety as follows:
     “SECTION 6.03. Total Debt Asset Coverage Ratio. The Borrower will not
permit, as of the last day of any Fiscal Quarter, the ratio of (a) the sum of
(i) the Proved PV-10 Value as of such day plus (ii) 50% of the BBEP Fair Market
Value as of such day to (b) the Total Debt as of

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4

such day to be less than the ratio set forth below opposite the period that
includes such day:

      Period   Ratio
June 30, 2009 to March 31, 2010
  1.30 to 1.00
June 30, 2010 and thereafter
  1.50 to 1.00”

          (e) Section 6.04 of the Credit Agreement is hereby amended is hereby
amended and restated in its entirety as follows:
     “SECTION 6.04. Total Secured Debt Asset Coverage Ratio. The Borrower will
not permit, as of the last day of any Fiscal Quarter, the ratio of (a) the sum
of (i) the Proved PV-10 Value as of such day plus (ii) 50% of the BBEP Fair
Market Value as of such day to (b) the Total Secured Debt as of such day to be
less than the ratio set forth below opposite the period that includes such day:

      Period   Ratio
September 30, 2008 through March 31, 2009
  2.00 to 1.00
June 30, 2009 through March 31, 2010
  1.60 to 1.00
June 30, 2010 through September 30, 2010
  2.00 to 1.00
December 31, 2010 and thereafter
  2.25 to 1.00”

          (f) Section 7.01 of the Credit Agreement is hereby amended (i) to
delete the word “and” at the end of clause (p) thereof, (ii) to replace the
period at the end of clause (q) thereof with “; and” and (iii) to add
immediately after the end of clause (q) thereof the following new clause (r):
“(r) the New Senior Notes, provided that the Net Cash Proceeds thereof are
applied in the manner required, and to the extent required, by Section 2.09(b)
to prepay the Loans.”
(g) Section 7.13 of the Credit Agreement is hereby amended as follows:
     (i) by amending and restating clause (i) of the first proviso set forth
therein in its entirety as follows:
“(i) so long as no Default or Event of Default has occurred and is continuing or
would result therefrom, the Borrower or any other

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5

Credit Party may, in connection with any refinancing of any Existing Notes
(other than any New Senior Notes) or any Permitted Subordinated Indebtedness, or
of any Refinancing Indebtedness in respect of any thereof, permitted by
Section 7.01, prepay all or any portion of the principal of, and accrued
interest and premiums, if any, on, any such Existing Notes, any Permitted
Subordinated Indebtedness or any such Refinancing Indebtedness prior to the
scheduled maturity thereof;”; and
     (ii) by amending and restating in its entirety the last sentence thereof as
follows:
“Notwithstanding the foregoing, the provisions of this Section shall in no event
or circumstance apply to or restrict any payment (whether in respect of a
purchase, repurchase, redemption, defeasance, prepayment or otherwise) that the
Borrower is obligated to make in respect of any Existing Senior Notes or any New
Senior Notes; provided, however, that, except for any actions permitted under
clause (i) or (iii) above, the Borrower will not, nor will the Borrower permit
any other Credit Party to, take any action, or omit to take any action, if, as
the direct result of such action or omission, any Existing Senior Notes or any
New Senior Notes shall become due and payable prior to the scheduled maturity
thereof.”.
          (h) Section 7.14 of the Credit Agreement is hereby amended by amending
clause (i) of the first proviso set forth therein (i) to insert in subclause
(C) thereof the phrase “(other than any New Senior Notes)” immediately after
each reference to “the Existing Notes”, (ii) to replace the word “and” at the
end of subclause (C) thereof with a comma, (iii) to renumber subclause
(D) thereof as subclause (E) and (iv) to add immediately after the end of
subclause (C) thereof the following new subclause (D):
“(D) restrictions and conditions imposed by any definitive agreements governing
or evidencing any of the New Senior Notes, provided that the restrictions and
conditions contained in any such definitive agreements are not materially less
favorable to the Lenders, taken as a whole, than the restrictions and conditions
imposed by the definitive agreements governing or evidencing the Existing Senior
Notes as in effect on the date hereof, and”.
          (i) Section 10.16 of the Credit Agreement is hereby amended by
replacing the phrase “Section 7.02 thereof” set forth therein with the phrase
“Section 7.01 or 7.02 thereof”.
          SECTION 3. Concerning the New Senior Notes. (a) Each Lender party
hereto acknowledges that the Borrower desires that obligations of the Borrower
and the Subsidiaries under the New Senior Notes Documents be secured by Liens
created under the Security Documents on substantially the same terms as such
Liens secure obligations of the Borrower and the Subsidiaries under the Existing
Senior Notes Documents. Each

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6

Lender party hereto irrevocably (i) consents to such amendments, supplements or
other modifications to the Security Documents as the Administrative Agent
determines to be required or desired in order to secure thereunder obligations
of the Borrower and the Subsidiaries under the New Senior Notes Documents on
substantially the same terms as the obligations of the Borrower and the
Subsidiaries under the Existing Senior Notes Documents are secured thereunder,
and to provide to the New Senior Notes, and the holders thereof, all the other
rights, powers and privileges that are provided for thereunder with respect to
the Existing Senior Notes and the holders thereof, (ii) authorizes and directs
the Administrative Agent to execute and deliver such agreement or agreements as
shall effectuate such amendments, supplements or other modifications, in each
case without any further consent, authorization or other action by such Lender,
and (iii) agrees that such Lender shall not have any right of action whatsoever
against the Administrative Agent as a result of any action taken by the
Administrative Agent pursuant to this paragraph. Without limiting the foregoing,
each Lender party hereto consents to (A) the amendment of the term “Secured
Obligations” to include Indebtedness due with respect to the New Senior Notes
and the Guarantees of the Subsidiaries in respect thereof and (B) the amendment
of the term “Secured Parties” to include each holder of the New Senior Notes.
          (b) Each Lender party hereto acknowledges that, as a condition
precedent under the First Lien Loan Documents to the issuance of the New Senior
Notes, the Liens securing the New Senior Notes and the holders thereof are
required to be subject to the terms of the Intercreditor Agreement. Each Lender
party hereto irrevocably (i) consents to such amendments, supplements or other
modifications to the Intercreditor Agreement as the Administrative Agent
determines to be required or desired in order to subject the Liens securing the
New Senior Notes, and the rights, powers and privileges of the holders of the
New Senior Notes, to the provisions of the Intercreditor Agreement on
substantially the same terms as such provisions apply to the Liens securing the
Existing Senior Notes and the rights, powers and privileges of the holders of
the Existing Senior Notes, (ii) authorizes and directs the Administrative Agent
to execute and deliver such agreement or agreements as shall effectuate such
amendments, supplements or other modifications, in each case without any further
consent, authorization or other action by such Lender, and (iii) agrees that
such Lender shall not have any right of action whatsoever against the
Administrative Agent as a result of any action taken by the Administrative Agent
pursuant to this paragraph.
          (c) The Administrative Agent shall have the benefit of the provisions
of Article IX of the Credit Agreement with respect to all actions taken by it
pursuant to this Section to the full extent thereof.
          (d) The Loans and other Term Obligations are hereby designated as
“Senior Indebtedness” for purposes of the New Senior Notes Indenture.
          (e) The Lenders party hereto agree that, in respect of any Prepayment
Event arising from the incurrence of any New Senior Notes, the Borrower shall be
deemed to be in compliance with Section 2.09(e) so long as the Borrower shall
have

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7

given the notice contemplated by such Section in connection with such Prepayment
Event on or prior to the Prepayment Date with respect thereto.
          SECTION 4. Representations and Warranties. The Borrower represents and
warrants to the Administrative Agent and the Lenders that:
          (a) The execution, delivery and performance by the Borrower of this
Amendment have been duly authorized by all necessary corporate or other
organizational action on the part of the Borrower. This Amendment has been duly
executed and delivered by the Borrower and this Amendment and the Credit
Agreement, as amended by this Amendment, constitute legal, valid and binding
obligations of the Borrower, enforceable against it in accordance with their
terms, except as the enforceability thereof may be limited by (i) bankruptcy,
insolvency, reorganization, moratorium, or similar Governmental Rules affecting
creditors’ rights generally, and (ii) equitable principles of general
applicability (whether enforcement is sought by proceedings at law or in
equity).
          (b) The representations and warranties of the Borrower and the other
Loan Parties set forth in the Credit Agreement and the other Loan Documents are
true and correct in all material respects on and as of the Amendment Effective
Date (as defined below), except in the case of any such representation or
warranty that is made expressly as of an earlier date, in which case such
representation or warranty is true and correct in all material respects on and
as of such earlier date.
          (c) On and as of the Amendment Effective Date, no Default has occurred
and is continuing.
          SECTION 5. Amendment Fees. The Borrower agrees to pay to the
Administrative Agent, for the account of each Lender that executes and delivers
a copy of this Amendment to the Administrative Agent (or its counsel) at or
prior to 5:00 p.m., New York City time, on June 3, 2009, an amendment fee
(collectively, the “Amendment Fees”) in an amount equal to 0.25% of the
aggregate principal amount of the Loans of such Lender outstanding on such date.
The Amendment Fees shall be payable in immediately available funds on, and
subject to the occurrence of, the Amendment Effective Date.
          SECTION 6. Conditions to Effectiveness. This Amendment shall become
effective on and as of the date on which each of the following conditions
precedent is satisfied (such date, the “Amendment Effective Date”):
          (a) The Administrative Agent (or its counsel) shall have received
either signed counterparts of this Amendment or written evidence satisfactory to
the Administrative Agent (which may include facsimile or other customary
electronic transmission acceptable to the Administrative Agent of a signed
signature page of this Amendment) that, when taken together, bear the authorized
signatures of the Borrower and the Required Lenders.
          (b) The Administrative Agent shall have received such documents and
certificates as the Administrative Agent or its counsel may reasonably request
relating to

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8

the authorization of the transactions contemplated hereby and any other legal
matters relating to the Borrower, the Loan Documents or the transactions
contemplated hereby, all in form and substance reasonably satisfactory to the
Administrative Agent.
          (c) The representations and warranties of the Borrower set forth in
Section 4 hereof shall be true and correct as of the Amendment Effective Date,
and the Administrative Agent shall have received a certificate, dated the
Amendment Effective Date and signed by the Chief Executive Officer or a
Financial Officer of the Borrower, confirming the accuracy thereof, which shall
be in form and substance reasonably satisfactory to the Administrative Agent.
          (d) The Administrative Agent shall have received the Amendment Fees
and all fees payable to the Administrative Agent or any Affiliate thereof
pursuant to that certain engagement letter entered into in connection with this
Amendment that are required to be paid on or before the Amendment Effective Date
and all amounts required to be paid to the Administrative Agent or any Affiliate
thereof in accordance with any Loan Document on or prior to the Amendment
Effective Date, including reimbursement or payment of all reasonable
out-of-pocket expenses (including reasonable fees, charges and disbursements of
counsel) required to be reimbursed or paid by any Loan Party under any Loan
Document.
          SECTION 7. Effect of Amendment. (a) Except as expressly set forth
herein, this Amendment shall not by implication or otherwise limit, impair,
constitute a waiver of or otherwise affect the rights and remedies of the
Lenders, the Administrative Agent (or any sub-agent thereof) or the Arrangers
under the Credit Agreement or any other Loan Document, and shall not alter,
modify, amend or in any way affect any of the terms, conditions, obligations,
covenants or agreements contained in the Credit Agreement or any other Loan
Document, all of which are ratified and affirmed in all respects and shall
continue in full force and effect. Nothing herein shall be deemed to entitle any
Loan Party to a consent to, or a waiver, amendment, modification or other change
of, any of the terms, conditions, obligations, covenants or agreements contained
in the Credit Agreement or any other Loan Document in similar or different
circumstances.
          (b) On and after the Amendment Effective Date, each reference in the
Credit Agreement to “this Agreement”, “hereunder”, “hereof”, “herein”, or words
of like import, and each reference to the Credit Agreement in any other Loan
Document shall be deemed to be a reference to the Credit Agreement as amended
hereby. This Amendment shall constitute a “Loan Document” for all purposes of
the Credit Agreement and the other Loan Documents.
          SECTION 8. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
          SECTION 9. Counterparts. This Amendment may be executed in
counterparts (and by different parties hereto on different counterparts), each
of which

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9

shall constitute an original, but all of which, when taken together, shall
constitute a single contract. Delivery of an executed counterpart of a signature
page of this Amendment by facsimile or other electronic imaging shall be as
effective as delivery of a manually executed counterpart of this Amendment.
          SECTION 10. Headings. Section headings used herein are for convenience
of reference only, are not part of this Amendment and shall not affect the
construction of, or be taken into consideration in interpreting, this Amendment.
[Remainder of page intentionally left blank]

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10

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed by their respective authorized officers as of the day and year
first written above.

                  QUICKSILVER RESOURCES INC.,    
 
           
 
  by   /s/ MarLu S. Hiller    
 
           
 
      Name: MarLu S. Hiller    
 
      Title: Vice President — Treasurer    

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      CREDIT SUISSE, CAYMAN
ISLANDS BRANCH, individually
and as Administrative Agent,    
 
           
 
  by   /s/ Vanessa Gomez    
 
           
 
      Name: Vanessa Gomez    
 
      Title: Director    
 
           
 
  by   /s/ Mikhail Faybusovich    
 
           
 
      Name: Mikhail Faybusovich    
 
      Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LOOMIS SAYLES CLO I, LTD.    
 
       
by
  Loomis, Sayles and Company, L.P., its Collateral Manager    
 
       
by
  Loomis, Sayles and Company, Inc., its General Partner    
 
       
 
  /s/ Kevin P. Charleston    
 
       
 
  Name: Kevin P. Charleston    
 
  Title: Executive Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  AMMC CLO III, LIMITED    
 
       
by
  American Money Management Corp., as Collateral Manager    
 
       
 
  /s/ Chester M. Eng    
 
       
 
  Name: Chester M. Eng    
 
  Title: Senior Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  AMMC CLO IV, LIMITED    
 
       
by
  American Money Management Corp., as Collateral Manager    
 
       
 
  /s/ Chester M. Eng    
 
       
 
  Name: Chester M. Eng    
 
  Title: Senior Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM HIGH YIELD TRUST    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: VP    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM VARIABLE TRUST — PVT DIVERSIFIED INCOME FUND    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: VP    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  INTERPOLIS PENSIOENEN GLOBAL HIGH YIELD POOL    
 
       
by
  /s/ Angela Patel    
 
       
 
  Name: Angela Patel    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM HIGH YIELD ADVANTAGE FUND    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: VP    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM ASSET ALLOCATION FUND: BALANCED PORTFOLIO    
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM FLOATING RATE INCOME FUND    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: V.P.    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM DIVERSIFIED INCOME TRUST (CAYMAN) MASTER FUND    
 
       
by
  /s/ Angela Patel    
 
       
 
  Name: Angela Patel    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  THE PUTNAM ADVISORY COMPANY, LLC ON BEHALF OF PUTNAM GLOBAL FUNDS — PUTNAM
WORLDWIDE INCOME FUND    
 
       
by
  /s/ Lauren Silk    
 
       
 
  Name: Lauren Silk    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM PREMIER INCOME TRUST    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM MASTER INTERMEDIATE INCOME TRUST    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title: Vice President    

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM VARIABLE TRUST — PUTNAM VT GLOBAL ASSET ALLOCATION FUND    
 
       
by
  Putnam Investment Management, LLC    
 
       
 
  /s/ Lauren Silk    
 
       
 
  Name: Lauren Silk    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM DIVERSIFIED INCOME TRUST    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM TOTAL RETURN TRUST    
 
       
by
  Putnam Investment Management LLC    
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM RETIREMENT ADVANTAGE GAA BALANCE PORTFOLIO    
 
       
by
  Putnam Investment Management LLC    
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM RETIREMENT ADVANTAGE GAA GROWTH PORTFOLIO    
 
       
by
  Putnam Investment Management, LLC    
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  THE PUTNAM ADVISORY COMPANY, LLC ON BEHALF OF IG PUTNAM HIGH YIELD INCOME FUND
   
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM VARIABLE TRUST — PVT HIGH YIELD FUND    
 
       
by
  /s/ Beth Mazor    
 
       
 
  Name: Beth Mazor    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  THE PUTNAM ADVISORY COMPANY, LLC ON BEHALF OF STICHTING PENSIOENFONDS VOOR
FYSIOTHERAPEUTEN    
 
       
by
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ANCHORAGE CROSSOVER CREDIT FINANCE, LTD    
 
       
by
  Anchorage Advisors, L.L.C., its Investment Manager    
 
       
 
  /s/ Daniel Allen    
 
       
 
  Name: Daniel Allen    
 
  Title:   Senior Portfolio Manager    
 
       
Name of Lender:
  PCI FUND L.L.C.    
 
       
by
  Anchorage Advisors, L.L.C., its Investment Manager    
 
       
 
  /s/ Daniel Allen    
 
       
 
  Name: Daniel Allen    
 
  Title:   Senior Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GRAND CENTRAL ASSET TRUST, LBAM SERIES    
 
       
by
  /s/ Adam Jacobs    
 
       
 
  Name: Adam Jacobs    
 
  Title:   Attorney-in-Fact    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIGHTPOINT CLO 2004-1, LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIGHTPOINT CLO III, LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIGHTPOINT CLO IV, LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIGHTPOINT CLO V, LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIGHTPOINT CLO VIII LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ARLIE CLO 2006-I, LTD.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ALTICOR INC.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NEUBERGER BERMAN HIGH INCOME BOND FUND    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NEUBERGER BERMAN INCOME OPPORTUNITY FUND, INC.    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  OHIO POLICE & FIRE PENSION FUND    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PLUMBERS & PIPEFITTER NATIONAL PENSION FUND    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PRINCIPAL INVESTORS FUND, INC — HIGH YIELD FUND    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GMAM INVESTMENT FUNDS TRUST    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LEHMAN BROTHERS FIRST TRUST INCOME OPPORTUNITY FUND    
 
       
by
  /s/ Colin Donlan    
 
       
 
  Name: Colin Donlan    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NORTHWOODS CAPITAL IV, LIMITED    
 
       
by
  Angelo, Gordon & Co. L.P., as Collateral Manager    
 
       
 
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    
 
       
Name of Lender:
  NORTHWOODS CAPITAL V, LIMITED    
 
       
by
  Angelo, Gordon & Co. L.P., as Collateral Manager    
 
       
 
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NORTHWOODS CAPITAL VI, LIMITED    
 
       
by
  Angelo, Gordon & Co. L.P., as Collateral Manager    
 
       
 
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    
 
       
Name of Lender:
  NORTHWOODS CAPITAL VII, LIMITED    
 
       
by
  Angelo, Gordon & Co. L.P., as Collateral Manager    
 
       
 
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  AG DIVERSIFIED CREDIT STRATEGIES MASTER, L.P.    
 
       
by
  AG Diversified Credit Strategies GP, LLC, its General Partner    
 
       
by
  Angelo, Gordon & Co. L.P., its Manager    
 
       
 
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    
 
       
Name of Lender:
  JRG REINSURANCE COMPANY, LTD.    
 
       
by
  Angelo, Gordon & Co. L.P., as Investment Manager    
 
       
by
  /s/ Bruce Martin    
 
       
 
  Name: Bruce Martin    
 
  Title:   Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  BLACKSTONE SPECIAL FUNDING (IRELAND) GSO CAPITOL PARTNERS LP, its Manager    
 
       
by
  /s/ George Fan    
 
       
 
  Name: George Fan    
 
  Title:   Attorney-in-Fact    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CENTRAL STATES, S.E. & S.W. AREAS PENSION FUND    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  STONE HARBOR HIGH YIELD BOND FUND    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LIBRA GLOBAL LIMITED    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LOYALIS SCHADE NV    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  MULTI MANAGER PROGRAMMES PCC LIMITED GLOBAL HIGH YIELD
MASTER FUND    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NEW YORK TIMES COMPANY PENSION TRUST    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  COMMONWEALTH OF PENNSYLVANIA STATE EMPLOYEES RETIREMENT
SYSTEM    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  STONE HARBOR LEVERAGED LOAN PORTFOLIO    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  SAN JOAQUIN COUNTY EMPLOYEES’ RETIREMENT ASSOCIATION    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  STONE HARBOR INVEST FUNDS PLC — STONE HARBOR HIGH YIELD
BOND FUND    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  UBS (UK) PENSION AND LIFE ASSURANCE SCHEME    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  REGENTS OF THE UNIVERSITY OF CALIFORNIA    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  VIRGINIA RETIREMENT SYSTEM    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  WELLS FARGO & COMPANY MASTER PENSION TRUST    
 
       
by
  /s/ Beth Semmel    
 
       
 
  Name: Beth Semmel    
 
  Title:   Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GALE FORCE 1 CLO, LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GALE FORCE 2 CLO, LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GALE FORCE 3 CLO, LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GALE FORCE 4 CLO, LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CHELSEA PARK CLO LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  COLUMBUS PARK CDO LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  JACKSON SQUARE CLO LTD.    
 
       
by
  GSO/Blackstone Debt Funds Management LLC, as Collateral Manager    
 
       
 
  /s/ Daniel H. Smith    
 
       
 
  Name: Daniel H. Smith    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LAFAYETTE SQUARE CDO LTD.    
 
       
by
  Blackstone Debt Advisors L.P., as Collateral Manager    
 
       
 
  /s/ Dean T. Criares    
 
       
 
  Name: Dean T. Criares    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  UNION SQUARE CDO LTD.    
 
       
by
  Blackstone Debt Advisors L.P., as Collateral Manager    
 
       
 
  /s/ Dean T. Criares    
 
       
 
  Name: Dean T. Criares    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  HIGH YIELD BOND COMMON TRUST FUND (CMN1)    
 
       
by
  /s/ Kali Ramachandran    
 
       
 
  Name: Kali Ramachandran    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PUTNAM INVESTMENT MANAGEMENT LLC, on behalf of its series, ASSET ALLOCATION
CONSERVATIVE    
 
       
by
  PUTNAM INVESTMENT MANAGEMENT, LLC    
 
       
 
  /s/ Suzanne Deshaies    
 
       
 
  Name: Suzanne Deshaies    
 
  Title:   Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  SILVER LAKE CREDIT FUND, L.P.    
 
       
by
  SILVER LAKE FINANCIAL ASSOCIATES, L.P., its General Partner    
 
       
 
  /s/ Roger Wittlin    
 
       
 
  Name: Roger Wittlin    
 
  Title:   Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  OREGON PUBLIC EMPLOYEES RETIREMENT FUND    
 
       
by
  /s/ Sue Wawreycki    
 
       
 
  Name: Sue Wawreycki    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  KKR FI PARTNERS I, LP    
 
       
by
  /s/ Sue Wawreycki    
 
       
 
  Name: Sue Wawreycki    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NUVEEN FLOATING RATE INCOME FUND    
 
       
by
  Symphony Asset Management, LLC    
 
       
 
  /s/ James Kim    
 
       
 
  Name: James Kim    
 
  Title:   Associate Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  NUVEEN SENIOR INCOME FUND    
 
       
by
  Symphony Asset Management, LLC    
 
       
 
  /s/ James Kim    
 
       
 
  Name: James Kim    
 
  Title:   Associate Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ARES ENHANCED CREDIT OPPORTUNITIES FUND LTD.    
 
       
by
  Ares Enhanced Credit Opportunities Fund Management, L.P,    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES ENHANCED LOAN INVESTMENT STRATEGY IR LTD.    
 
       
by
  Ares Enhanced Loan Management IR, L.P., as Portfolio Manager    
 
       
by
  Ares Enhanced Loan IR GP, LLC, as its General Partner    
 
       
by
  Ares Management LLC, as its Manager    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES INSTITUTIONAL LOAN FUND B.V.    
 
       
by
  Ares Management Limited, its Investment Advisor    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ARES XII CLO LTD.    
 
       
by
  Ares CLO Management XII, L.P.    
 
       
by
  Ares CLO GP XII, LLC, its General Partner    
 
       
by
  Ares Management LLC, its Manger    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES ENHANCED LOAN INVESTMENT STRATEGY II, LTD.    
 
       
by
  Ares Enhanced Loan Management II, L.P., Investment Manager    
 
       
by
  Ares Enhanced Loan GP II, LLC, its General Partner    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  FUTURE FUND BOARD OF GUARDIANS    
 
       
by
  Ares Enhanced Loan Investment Strategy Advisor IV, L.P., its Investment
Manager    
 
       
by
  Ares Enhanced Loan Investment Strategy Advisor IV, LLC., its General Partner  
 

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
by
  Ares Management LLC, its Managing Member    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES XI CLO LTD.    
 
       
by
  Ares CLO Management XI, L.P.    
 
       
by
  Ares CLO GP XI, LLC, its General Partner    
 
       
by
  Ares Management LLC, its Manager    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES X CLO LTD.    
 
       
by
  Ares CLO Management X, L.P., Investment Manager    
 
       
by
  Ares CLO GP X, LLC, its General Partner    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ARES IIR CLO LTD.    
 
       
by
  Ares CLO Management IIR, L.P., Investment Manager    
 
       
by
  Ares CLO GP IIR, LLC, its General Partner    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES VR CLO LTD.    
 
       
by
  Ares CLO Management VR, L.P., Investment Manager    
 
       
by
  Ares CLO GP VR, LLC, its General Partner    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    
 
       
Name of Lender:
  ARES VIII CLO LTD.    
 
       
by
  Ares CLO Management VIII, L.P., Investment Manager    
 
       
by
  Ares CLO GP VIII, LLC, its General Partner    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title:   Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GLOBAL LOAN OPPORTUNITY FUND B.V.    
 
       
by
  Ares Management Limited, its Portfolio Manager    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title: Authorized Signatory    
 
       
Name of Lender:
  ARES IIIR/IVR CLO LTD.    
 
       
by
  Ares CLO Management IIIR/IVR, L.P.    
 
       
by
  Ares CLO GP IIIR/IVR, LLC, its General Partner    
 
       
by
  Ares Management LLC, its Manager    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title: Authorized Signatory    
 
       
Name of Lender:
  ARES VIR CLO LTD.    
 
       
by
  Ares CLO Management VIR, L.P., Investment Manager    
 
       
by
  Ares CLO GP VIR, LLC, its General Manager    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ARES IX CLO LTD.    
 
       
by
  Ares CLO Management IX, L.P., Investment Manager    
 
       
by
  Ares CLO GP IX, LLC, its General Partner    
 
       
by
  Ares Management LLC, its Managing Member    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title: Authorized Signatory    
 
       
Name of Lender:
  SEI INSTITUTIONAL INVESTMENT TRUST — HIGH YIELD BOND FUND    
 
       
by
  Ares Management LLC, as Sub-Adviser    
 
       
 
  /s/ Americo Cascella    
 
       
 
  Name: Americo Cascella    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  COLUMBUSNOVA CLO LTD. 2006-II    
 
       
by
  /s/ John Bengough    
 
       
 
  Name: John Bengough    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  COLUMBUSNOVA CLO LTD. 2007-I    
 
       
by
  /s/ John Bengough    
 
       
 
  Name: John Bengough    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  COLUMBUSNOVA CLO IV LTD. 2007-II    
 
       
by
  /s/ John Bengough    
 
       
 
  Name: John Bengough    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  EAGLE CREEK CLO LTD.    
 
       
by
  /s/ Bryan Higgins    
 
       
 
  Name: Bryan Higgins    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  FALL CREEK CLO, LTD.    
 
       
by
  /s/ Bryan Higgins    
 
       
 
  Name: Bryan Higgins    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  CLYDESDALE CLO 2003 LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Collateral Manager    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CLYDESDALE CLO 2004, LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Manager    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CLYDESDALE STRATEGIC CLO I, LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Manager    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CLYDESDALE 2005, LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Manager    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  CLYDESDALE CLO 2006, LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Manager    
 
       
by
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  CLYDESDALE CLO 2007, LTD.    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Manager    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  NCRAM LOAN TRUST    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Adviser    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  NCRAM SENIOR LOAN TRUST - 2005    
 
       
by
  Nomura Corporate Research and Asset Management Inc., as Investment Adviser    
 
       
 
  /s/ Robert Hoffman    
 
       
 
  Name: Robert Hoffman    
 
  Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
       
Name of Lender:
  PIMCO HIGH YIELD FUND    
 
       
by
  Pacific Investment Management Company LLC, as its Investment Advisor for the
PIMCO High Yield Fund, acting through Investors Fiduciary Trust Company in the
Nominee Name of IFTCO    
 
       
by
  /s/ Arthur Y.D. Ong    
 
       
 
  Name: Arthur Y.D. Ong    
 
  Title: Executive Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ING PIMCO HIGH YIELD PORTFOLIO    
 
       
by
  Pacific Investment Management Company LLC, as its Investment Advisor    
 
       
 
  /s/ Arthur Y.D. Ong    
 
       
 
  Name: Arthur Y.D. Ong    
 
  Title: Executive Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  RED RIVER HYPI, L.P.    
 
       
by
  Pacific Investment Management Company LLC, as its Investment Advisor, acting
through Investors Fiduciary Trust Company in the Nominee Name of IFTCO    
 
       
 
  /s/ Arthur Y.D. Ong    
 
       
 
  Name: Arthur Y.D. Ong    
 
  Title: Executive Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  VICTORIA FALLS CLO, LTD.    
 
       
by
  /s/ Kim Atkinson    
 
       
 
  Name: Kim Atkinson    
 
  Title: Sr. Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  SUMMIT LAKE CLO, LTD.    
 
       
by
  /s/ Kim Atkinson    
 
       
 
  Name: Kim Atkinson    
 
  Title: Sr. Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CLEAR LAKE CLO, LTD.    
 
       
by
  /s/ Kim Atkinson    
 
       
 
  Name: Kim Atkinson    
 
  Title: Sr.Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ST. JAMES RIVER CLO, LTD.    
 
       
by
  /s/ Kim Atkinson    
 
       
 
  Name: Kim Atkinson    
 
  Title: Sr. Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  SSGA HIGH YIELD BOND FUND    
 
       
by
  /s/ Kali Ramachandran    
 
       
 
  Name: Kali Ramachandran    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  RBC DEXIA INVESTOR SERVICES TRUST AS TRUSTEE FOR GM CANADA
FOREIGN TRUST    
 
       
by
  /s/ Sherri Smulewicz    
 
       
 
  Name: Sherri Smulewicz    
 
  Title: Client Service Manager    
 
       
 
  /s/ John P. Nolan    
 
       
 
  Name: John P. Nolan    
 
  Title: Senior Manager, Client Service RBC Dexia
          Investor Services Trust    

In connection with the amendment of Quicksilver the bank loan the Trustee is
hereby instructed to enter into and execute the Amendment Agreement any other
documents or instruments as may be ancillary to the Transaction and the Trustee
is hereby authorized to carry out its obligations there under.

         
 
  LEHMAN BROTHERS ASSET MANAGEMENT LLC    
 
       
by
  /s/ Jonathan S. Cook    
 
       
 
  Name: Jonathan S. Cook    
 
  Title: Lehman Brothers Asset Management LLC    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CREDIT SUISSE SYNDICATED LOAN FUND.    
 
       
by
  Credit Suisse Alternative Capital, Inc., as Agent (Subadvisor) for Credit
Suisse Asset Management (Australia) Limited, the Responsible Entity for Credit
Suisse Syndicated Loan Fund    
 
       
 
  /s/ Thomas Flannery    
 
       
 
  Name: Thomas Flannery    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  CSAM FUNDING I    
 
       
by
  /s/ Thomas Flannery    
 
       
 
  Name: Thomas Flannery    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ORIX FINANCE CORP.    
 
       
by
  /s/ Christopher L. Smith    
 
       
 
  Name: Christopher L. Smith    
 
  Title: Authorized Representative    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  IRON HILL CLO LIMITED    
 
       
by
  /s/ Adrian Duffy    
 
       
 
  Name: Adrian Duffy    
 
  Title: Senior Managing Director Guggenheim
          Partners Europe Limited    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  HARBOURVIEW CLO 2006-1    
 
       
by
  /s/ Brad Hebert    
 
       
 
  Name: Brad Hebert    
 
  Title: AVP    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  VISTA LEVERAGED INCOME FUND    
 
       
by
  MJX LLC, its Investment Advisor    
 
       
 
  /s/ John P. Calaba    
 
       
 
  Name: John P. Calaba    
 
  Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   WHITE HORSE III, LTD.
 
       
 
  by   White Horse Capital Partners, LP,
as Collateral Manager
 
       
 
  by   White Rock Asset Advisor, LLC,
its General Partner
 
       
 
      /s/ Ethan M. Underwood, CFA
 
       
 
      Name: Ethan M. Underwood, CFA
 
      Title: Portfolio Manager

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   WHITE HORSE IV, LTD.
 
       
 
  by   White Horse Capital Partners, LP,
as Collateral Manager
 
       
 
  by   White Rock Asset Advisor, LLC,
its General Partner
 
       
 
      /s/ Ethan M. Underwood, CFA
 
       
 
      Name: Ethan M. Underwood, CFA
 
      Title: Portfolio Manager

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK III CDO LIMITED
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK IV CDO LIMITED
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK V CDO LIMITED
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GREYMARK CDO LTD.
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK VII CDO LIMITED
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK VIII CDO LIMITED
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LANDMARK IX CDO LTD
 
       
 
  by   Alladin Capital Management LLC,
as Manager
 
       
 
      /s/ William W. Lowry, CFA
 
       
 
      Name: William W. Lowry, CFA
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CREDIT SUISSE LOAN FUNDING LLC
 
       
 
  by   /s/ Kenneth Hoffman
 
       
 
      Name: Kenneth Hoffman
 
      Title: Managing Director
 
       
 
      /s/ Robert Healey
 
       
 
      Name: Robert Healey
 
      Title: Director

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   EMPLOYERS INSURANCE COMPANY OF WAUSAU
 
       
 
       
 
  by   /s/ Sheila Finnerty
 
       
 
      Name: Sheila Finnerty
 
      Title: Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LIBERTY MUTUAL FIRE INSURANCE COMPANY
 
       
 
  by   /s/ Sheila Finnerty
 
       
 
      Name: Sheila Finnerty
 
      Title: Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LIBERTY MUTUAL INSURANCE COMPANY
 
       
 
  by   /s/ Sheila Finnerty
 
       
 
      Name: Sheila Finnerty
 
      Title: Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   LOAN FUNDING XIII for itself or as agent for
 
       
 
  by   CORPORATE FUNDING XIII,
as a Lender
 
       
 
      /s/ Brian C. Carlson
 
       
 
      Name: Brian C. Carlson
 
      Title: Principal
Silvermine Capital Management, LLC

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   COMSTOCK FUNDING LTD.
 
       
 
  by   Silvermine Capital Management LLC,
as Collateral Manager
 
       
 
      /s/ Brian C. Carlson
 
       
 
      Name: Brian C. Carlson
 
      Title: Principal
Silvermine Capital Management, LLC

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CANNINGTON FUNDING LTD.
 
       
 
  by   Silvermine Capital Management LLC,
as Investment Manager
 
       
 
      /s/ Brian C. Carlson
 
       
 
      Name: Brian C. Carlson
 
      Title: Principal
Silvermine Capital Management, LLC

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GREENS CREEK FUNDING LTD.
 
       
 
  by   Silvermine Capital Management LLC,
as Investment Manager
 
       
 
      /s/ Brian C. Carlson
 
       
 
      Name: Brian C. Carlson
 
      Title: Principal
Silvermine Capital Management, LLC

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ECP CLO 2008-1, LTD.
 
       
 
  by   Silvermine Capital Management LLC,
as Portfolio Manager
 
       
 
      /s/ Brian C. Carlson
 
       
 
      Name: Brian C. Carlson
 
      Title: Principal
Silvermine Capital Management, LLC

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   WESTERN ASSET FLOATING RATE HIGH INCOME FUND, LLC
 
       
 
  by   /s/ Chloé M. Page
 
       
 
      Name: Chloé M. Page
 
      Title: Authorized Signatory
 
       
 
  Name of Lender:   JOHN HANCOCK FUND II
FLOATING RATE INCOME FUND
 
       
 
  by   /s/ Chloé M. Page
 
       
 
      Name: Chloé M. Page
 
      Title: Authorized Signatory
 
       
 
  Name of Lender:   JOHN HANCOCK TRUST FLOATING RATE INCOME TRUST
 
       
 
  by   /s/ Chloé M. Page
 
       
 
      Name: Chloé M. Page
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   TCW ABSOLUTE RETURN CREDIT FUND, L.P.
 
       
 
  by   TCW Asset Management Company, its Investment Manager
 
       
 
      /s/ Melissa V. Weiler
 
       
 
      Name: Melissa V. Weiler
 
      Title: Managing Director
 
       
 
      /s/ Steven M. Koehler
 
       
 
      Name: Steven M. Koehler
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CELERITY CLO LIMITED
 
       
 
  by   TCW Asset Management Company,
as Agent
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ILLINOIS STATE BOARD OF INVESTMENT
 
       
 
  by   TCW Asset Management Company, as its Investment Advisor
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   MAC CAPITAL, LTD.
 
       
 
  by   TCW Asset Management Company, as its Portfolio Manager
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   MOMENTUM CAPITAL FUND, LTD.
 
       
 
  by   TCW Asset Management Company, as its Portfolio Manager
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   RGA REINSURANCE COMPANY
 
       
 
  by   TCW Asset Management Company, as its Investment Advisor
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   TCW CREDIT OPPORTUNITIES FUND, L.P.
 
       
 
  by   TCW Asset Management Company, as Manager
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   TCW SENIOR SECURED FLOATING RATE LOAN FUND, L.P.
 
       
 
  by   TCW Asset Management Company, as its Investment
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President
 
       
 
  Name of Lender:   TCW SENIOR SECURED LOAN FUND, L.P.
 
       
 
  by   TCW Asset Management Company, as its Investment Advisor
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   VELOCITY CLO LIMITED
 
       
 
  by   TCW Asset Management Company, as Collateral Manager
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   VITESSEE CLO LIMITED
 
       
 
  by   TCW Asset Management Company, as Portfolio Manager
 
       
 
      /s/ Stephen Suo
 
       
 
      Name: Stephen Suo
 
      Title: Senior Vice President
 
       
 
      /s/ G. Wayne Hosang
 
       
 
      Name: G. Wayne Hosang
 
      Title: Senior Vice President

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   TRANSAMERICA PARTNERS HIGH YIELD BOND PORTFOLIO
 
       
 
  by   /s/ Michael W. Weilheimer
 
       
 
      Name: Michael W. Weilheimer
 
      Title:

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  EATON VANCE EMERALD U.S. HIGH YIELD BOND FUND    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  INTERNATIONAL UNION OF OPERATING ENGINEERS OF EASTERN PENNSYLVANIA AND
DELAWARE    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  EATON VANCE COLLECTIVE INVESTMENT TRUST FOR EBP PLANS — HIGH YIELD FUND    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  HIGH INCOME OPPORTUNITIES PORTFOLIO    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  BOSTON INCOME PORTFOLIO    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  PLYMOUTH COUNTY RETIREMENT ASSOCIATION    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA    
 
       
by
  /s/ Michael W. Weilheimer    
 
       
 
  Name: Michael W. Weilheimer    
 
  Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  T. ROWE PRICE INSTITUTIONAL HIGH YIELD FUND    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  T. ROWE PRICE INSTITUTIONAL FLOATING RATE FUND    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  T. ROWE PRICE HIGH YIELD FUND, INC.    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  LUCENT TECHNOLOGIES INC. MASTER PENSION TRUST    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  JOHN HANCOCK TRUST — SPECTRUM INCOME TRUST    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  JOHN HANCOCK TRUST II — SPECTRUM INCOME FUND    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  IAM NATIONAL PENSION FUND    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  BOARD OF PENSIONS OF THE EVANGELICAL LUTHERAN CHURCH IN AMERICA    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    
 
       
Name of Lender:
  ACE TEMPEST LIFE REINSURANCE LIMITED    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  ACE TEMPEST REINSURANCE LIMITED    
 
       
by
  T. Rowe Price Associates, Inc. as investment advisor or investment
sub-advisor, as applicable    
 
       
 
  /s/ Jonathan D. Siegel    
 
       
 
  Name: Jonathan D. Siegel    
 
  Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  SILVER CREST CBNA LOAN FUNDING LLC    
 
       
by
  /s/ Adam Jacobs    
 
       
 
  Name: Adam Jacobs    
 
  Title: Assistant Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  GRAND CENTRAL ASSET TRUST, WAM SERIES    
 
       
by
  /s/ Andrew Valko    
 
       
 
  Name: Andrew Valko    
 
  Title: Assistant Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  AIMCO CLO, SERIES 2005-A    
 
       
by
  /s/ Chris Goergen    
 
       
 
  Name: Chris Goergen    
 
  Title: Authorized Signatory    
 
       
by
  /s/ Thomas Napholz    
 
       
 
  Name: Thomas Napholz    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
Name of Lender:
  AIMCO CLO, SERIES 2006-A    
 
       
by
  /s/ Chris Goergen    
 
       
 
  Name: Chris Goergen    
 
  Title: Authorized Signatory    
 
       
by
  /s/ Thomas Napholz    
 
       
 
  Name: Thomas Napholz    
 
  Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ALLSTATE LIFE INSURANCE COMPANY
 
       
 
  by   /s/ Chris Goergen
 
       
 
      Name: Chris Goergen
 
      Title: Authorized Signatory
 
       
 
  by   /s/ Thomas J. Napholz
 
       
 
      Name: Thomas J. Napholz
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ALLSTATE INSURANCE COMPANY
 
       
 
  by   /s/ Chris Goergen
 
       
 
      Name: Chris Goergen
 
      Title: Authorized Signatory
 
       
 
  by   /s/ Thomas J. Napholz
 
       
 
      Name: Thomas J. Napholz
 
      Title: Authorized Signatory

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   MERITAGE FUND LTD
 
       
 
  by   /s/ Nat Simons
 
       
 
      Name: Nat Simons
 
      Title: Director

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND II, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND III, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND IV, LTD.
 
       
 
  by    Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND V, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND VI, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CALLIDUS DEBT PARTNERS CLO FUND VII, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender: MAPS   CLO FUND I, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   MAPS CLO FUND II, LTD.
 
       
 
  by   Its Collateral Manager, Callidus Capital Management, LLC
 
       
 
      /s/ Ira Ginsburg
 
       
 
      Name: Ira Ginsburg
 
      Title: Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GULF STREAM-COMPASS CLO 2002-1 LTD
 
       
 
  by   Gulf Stream Asset Management LLC, as Collateral Manager
 
       
 
      /s/ Mark Abraham
 
       
 
      Name: Mark Abraham
 
      Title: Head of Trading
 
       
 
  Name of Lender:   GULF STREAM-COMPASS CLO 2003-1 LTD
 
       
 
  by   Gulf Stream Asset Management LLC, as Collateral Manager
 
       
 
      /s/ Mark Abraham
 
       
 
      Name: Mark Abraham
 
      Title: Head of Trading
 
       
 
  Name of Lender:   GULF STREAM-COMPASS CLO 2005-II LTD
 
       
 
  by   Gulf Stream Asset Management LLC, as Collateral Manager
 
       
 
      /s/ Mark Abraham
 
       
 
      Name: Mark Abraham
 
      Title: Head of Trading

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GULF STREAM-COMPASS CLO 2007, LTD.
 
       
 
  by   Gulf Stream Asset Management LLC, as Collateral Manager
 
       
 
      /s/ Mark Abraham
 
       
 
      Name: Mark Abraham
 
      Title: Head of Trading

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ABERDEEN HIGH YIELD FIXED INCOME PORTFOLIO, a series of
Aberdeen Fixed Income Funds Pooled Trust
 
       
 
  by   /s/ Neal Rayner
 
       
 
      Name: Neal Rayner
 
      Title: Portfolio Manager

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   ABERDEEN HIGH YIELD FIXED INCOME
FUND, a series of Aberdeen Fixed Income Funds LLC
 
       
 
  by   /s/ Neal Rayner
 
       
 
      Name: Neal Rayner
 
      Title: Portfolio Manager

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FLAGSHIP CLO III    
 
           
 
  by   Deutsche Investment Management Americas, Inc. (as successor in interest
to Deutsche Asset Management, Inc.), as Collateral Manager    
 
           
 
      /s/ Colleen Cunniffe
 
Name: Colleen Cunniffe    
 
      Title: Manager Director    
 
           
 
  by   /s/ James Sivigny
 
Name: James Sivigny    
 
      Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   LORD ABBETT INVESTMENT TRUST – LORD
ABBETT FLOATING RATE FUND    
 
           
 
  by   /s/ Elizabeth Mack    
 
     
 
Name: Elizabeth Mack    
 
      Title: Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   WELLS FARGO ENERGY CAPITAL, INC.    
 
           
 
  by   /s/ Bryan McDavid    
 
     
 
Name: Bryan McDavid    
 
      Title: Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

 

             
 
  Name of Lender:   GOLDEN KNIGHT II CLO, LTD.    
 
           
 
  by   Lord Abbett & Co. LLC As Collateral Manager    
 
           
 
      /s/ Elizabeth Mack    
 
     
 
Name: Elizabeth Mack    
 
      Title: Portfolio Manager    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

 

             
 
  Name of Lender:   BARCLAYS BANK PLC    
 
           
 
  by   /s/ Alex Stromberg    
 
     
 
Name: Alex Stromberg    
 
      Title:    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FRASER SULLIVAN CLO I LTD.    
 
           
 
  by   Fraser Sullivan Investment Management, LLC, as Collateral Manager    
 
           
 
      /s/ John W. Fraser    
 
     
 
Name: John W. Fraser    
 
      Title: Managing Partner    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FRASER SULLIVAN CLO II LTD.    
 
           
 
  by   Fraser Sullivan Investment Management, LLC, as Collateral Manager    
 
           
 
      /s/ John W. Fraser    
 
     
 
Name: John W. Fraser    
 
      Title: Managing Partner    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FRASER SULLIVAN CREDIT STRATEGIES FUNDING LTD.    
 
           
 
  by   Fraser Sullivan Investment Management, LLC, as
Ramp-Up Investment Manager    
 
           
 
      /s/ John W. Fraser    
 
     
 
Name: John W. Fraser    
 
      Title: Managing Partner    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   BALLYROCK CLO II LIMITED    
 
           
 
  by   Ballyrock Investment Advisors LLC, as Collateral Manager    
 
           
 
      /s/ Lisa Rymut    
 
     
 
Name: Lisa Rymut    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   BALLYROCK CLO III LIMITED    
 
           
 
  by   Ballyrock Investment Advisors LLC, as Collateral Manager    
 
           
 
      /s/ Lisa Rymut    
 
     
 
Name: Lisa Rymut    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   BALLYROCK CLO 2006-1 LIMITED    
 
           
 
  by   Ballyrock Investment Advisors LLC, as Collateral Manager    
 
           
 
      /s/ Lisa Rymut    
 
     
 
Name: Lisa Rymut    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   BALLYROCK CLO 2006-2 LIMITED    
 
           
 
  by   Ballyrock Investment Advisors LLC, as Collateral Manager    
 
           
 
      /s/ Lisa Rymut    
 
     
 
Name: Lisa Rymut    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   PYRAMIS FLOATING RATE HIGH INCOME COMMINGLED POOL    
 
           
 
  by   Pyramis Global Advisors Trust Company as Trustee    
 
           
 
      /s/ Lynn M. Farrand    
 
     
 
Name: Lynn M. Farrand    
 
      Title: Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FIDELITY CENTRAL INVESTMENT PORTFOLIOS LLC: FIDELITY
FLOATING RATE CENTRAL INVESTMENT PORTFOLIO    
 
           
 
  by   /s/ Gary Ryan    
 
     
 
Name: Gary Ryan    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FIDELITY AMERICAN HIGH YIELD FUND, for
Fidelity Investments Canada, Limited, as Trustee of    
 
           
 
  by   /s/ Gary Ryan    
 
     
 
Name: Gary Ryan    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FIDELITY ADVISOR SERIES I: FIDELITY ADVISOR
FLOATING RATE HIGH INCOME FUND    
 
           
 
  by   /s/ Gary Ryan    
 
     
 
Name: Gary Ryan    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   FIDELITY CANADIAN BALANCED FUND, for
Fidelity Investments Canada, Limited, as Trustee of    
 
           
 
  by   /s/ Gary Ryan    
 
     
 
Name: Gary Ryan    
 
      Title: Assistant Treasurer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   RIVERSOURCE BOND SERIES, INC. – RIVERSOURCE FLOATING RATE
FUND    
 
           
 
  by   /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Assistant Vice President    

             
 
  Name of Lender:   RIVERSOURCE STRATEGIC ALLOCATION SERIES, INC. – RIVERSOURCE
STRATEGIC INCOME ALLOCATION FUND    
 
           
 
  by   /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Assistant Vice President    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   CENTURION CDO VI, LIMITED    
 
           
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

             
 
  Name of Lender:   CENTURION CDO VII, LIMITED    
 
           
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

             
 
  Name of Lender:   CENTURION CDO 8, LIMITED    
 
           
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

             
 
  Name of Lender:   CENTURION CDO 9, LIMITED    
 
           
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil    
 
     
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CENT CDO 10 LIMITED

             
 
  by   RiverSource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

         
 
  Name of Lender:   CENT CDO XI, LIMITED

             
 
  by   RiverSource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CENT CDO 12 LIMITED

             
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

         
 
  Name of Lender:   CENT CDO 14 LIMITED

             
 
  by   Riversource Investments, LLC, as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CENT CDO 15 LIMITED

             
 
  by   RiverSource Investments, LLC as Collateral Manager    
 
           
 
      /s/ Robin C. Stancil
 
Name: Robin C. Stancil    
 
      Title: Director of Operations    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   NATIONWIDE LIFE INSURANCE COMPANY

             
 
  by   /s/ Ronald R. Serpico
 
Name: Ronald R. Serpico    
 
      Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   NAVIGATOR CDO 2004, LTD., as a Lender

             
 
  by   GE Asset Management Inc., as Collateral Manager    
 
           
 
      /s/ Kathleen Brooks
 
Name: Kathleen Brooks    
 
      Title: Authorized Signatory    

         
 
  Name of Lender:   NAVIGATOR CDO 2005, LTD., as a Lender

             
 
  by   GE Asset Management Inc., as Collateral Manager    
 
           
 
      /s/ Kathleen Brooks
 
Name: Kathleen Brooks    
 
      Title: Authorized Signatory    

         
 
  Name of Lender:   NAVIGATOR CDO 2006, LTD., as a Lender

             
 
  by   GE Asset Management Inc., as Collateral Manager    
 
           
 
      /s/ Kathleen Brooks
 
Name: Kathleen Brooks    
 
      Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GENERAL ELECTRIC PENSION TRUST, as a Lender

             
 
  by   GE Asset Management Inc., as Collateral Manager    
 
           
 
      /s/ Kathleen Brooks
 
Name: Kathleen Brooks    
 
      Title: Authorized Signatory    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   SUNAMERICA SENIOR FLOATING RATE FUND, INC.

             
 
  by   AIG Global Investment Corp. Investment Sub-Advisor    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   SATURN CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   GALAXY CLO 2003-1, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GALAXY III CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   GALAXY IV CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   GALAXY V CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GALAXY VI CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   GALAXY VII CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

         
 
  Name of Lender:   GALAXY VIII CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GALAXY X CLO, LTD.

             
 
  by   AIG Global Investment Corp., its Collateral Manager    
 
           
 
      /s/ W. Jeffrey Baxter
 
Name: W. Jeffrey Baxter    
 
      Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   JACKSON NATIONAL LIFE INSURANCE COMPANY

             
 
  by   PPM AMERICA, INC., as Attorney-in Fact    
 
           
 
      /s/ David C. Wagner
 
Name: David C. Wagner    
 
      Title: Managing Director    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CIFC FUNDING 2006-IB, LTD.

             
 
  by   /s/ Steve Vaccaro
 
Name: Steve Vaccaro    
 
      Title: Co-Chief Investment Officer    

         
 
  Name of Lender:   CIFC FUNDING 2006-II, LTD.

             
 
  by   /s/ Steve Vaccaro
 
Name: Steve Vaccaro    
 
      Title: Co-Chief Investment Officer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   CIFC FUNDING 2007-I, LTD.

             
 
  by   /s/ Steve Vaccaro
 
Name: Steve Vaccaro    
 
      Title: Co-Chief Investment Officer    

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   FLAGSHIP CLO IV

             
 
  by   Deutsche Investment Management Americas, Inc. (as successor in interest
to Deutsche Asset Management, Inc.), as Collateral Manager    
 
           
 
      /s/ Eric S. Meyer
 
Name: Eric S. Meyer    
 
      Title: Managing Director    

             
 
  by   /s/ James Sivigny
 
Name: James Sivigny    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   FLAGSHIP CLO V

             
 
  by   Deutsche Investment Management Americas, Inc. (as successor in interest
to Deutsche Asset Management, Inc.), as Collateral Manager    
 
           
 
      /s/ Eric S. Meyer
 
Name: Eric S. Meyer    
 
      Title: Managing Director    

             
 
  by   /s/ James Sivigny
 
Name: James Sivigny    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   FLAGSHIP CLO VI

             
 
  by   Deutsche Investment Management Americas, Inc., as Collateral Manager    
 
           
 
      /s/ Eric S. Meyer
 
Name: Eric S. Meyer    
 
      Title: Managing Director    

             
 
  by   /s/ James Sivigny
 
Name: James Sivigny    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   DWS FLOATING RATE PLUS FUND

             
 
  by   Deutsche Investment Management Americas, Inc., Investment Advisor    
 
           
 
      /s/ Eric S. Meyer
 
Name: Eric S. Meyer    
 
      Title: Managing Director    

             
 
  by   /s/ James Sivigny
 
Name: James Sivigny    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   DWS SHORT DURATION PLUS FUND

             
 
  by   Deutsche Investment Management Americas, Inc., Investment Advisor    
 
           
 
      /s/ Eric S. Meyer
 
Name: Eric S. Meyer    
 
      Title: Managing Director    

             
 
  by   /s/ James Sivigny
 
Name: James Sivigny
Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   SANDS POINT FUNDING LTD.

             
 
  by   /s/ Kaitlin Trinh
 
Name: Kaitlin Trinh    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   COPPER RIVER CLO LTD.

             
 
  by   /s/ Kaitlin Trinh
 
Name: Kaitlin Trinh    
 
      Title: Director    

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   GREEN LANE CLO LTD.
 
       
 
  by   /s/ Kaitlin Trinh
 
       
 
      Name: Kaitlin Trinh
 
      Title: Director

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   KENNECOTT FUNDING LTD.
 
       
 
  by   /s/ Kaitlin Trinh
 
       
 
      Name: Kaitlin Trinh
 
      Title: Director

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET
MANAGEMENT CLO 2008-II B.V.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET
MANAGERMENT EUROPEAN CLO
2007-I B.V.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

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SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON LOAN INVESTORS CLO I, LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON LOAN IVNESTORS CLO II, LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET MANAGEMENT CLO I LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET MANAGEMENT
LONG SECURED/SHORT UNSECURED CLO 2006-1 LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET MANAGEMENT LONG SECURED/SHORT
UNSECURED 2007-1 LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET MANAGEMENT LONG SECURED/SHORT
UNSECURED 2007-3 LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal

 

--------------------------------------------------------------------------------

 

SIGNATURE PAGE TO AMENDMENT NO 1. TO
CREDIT AGREEMENT DATED AS OF AUGUST 8, 2008, OF
QUICKSILVER RESOURCES INC.

         
 
  Name of Lender:   HALCYON STRUCTURED ASSET MANAGEMENT LONG SECURED/SHORT
UNSECURED 2007-2 LTD.
 
       
 
  by   /s/ David Martino
 
       
 
      Name: David Martino
 
      Title: Controller
 
       
 
  by   /s/ James W. Sykes
 
       
 
      Name: James W. Sykes
 
      Title: Managing Principal