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| Delaware(State or other jurisdiction of incorporation)                             |   | 20-3037840(IRS Employer Identification No.) |
|------------------------------------------------------------------------------------|--------|---------------------------------------------|
|                                                                               |   |                                        |
| 717 Texas Avenue, Suite 2900Houston, Texas(Address of principal executive offices) |   | 77002(Zip Code)                             |
|                                                                               |   |                                        |

| Large accelerated filer o | Accelerated filer o | Non-accelerated filer o                     | Smaller reporting company x |
|---------------------------|---------------------|---------------------------------------------|-----------------------------|
|                      |                | (Do not check if smaller reporting company) |

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|-----------------------------------|--------|
|                              | Page   |
|                              |   |
| Part II: Other Information   |   |
|                              |   |
| Item 6.   Exhibits | 4      |
|                              |   |
| Signatures                        | 6      |

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|   |   |                                                                                                                                                                                                                                                                                                                                 |   |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| Number |   | Description                                                                                                                                                                                                                                                                                                                          |   |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 3.1    |   | Certificate of Incorporation of Crimson Exploration Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                             |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 3.2    |   | By-laws of Crimson Exploration Inc. (incorporated by reference to Exhibit 3.7 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                                                  |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.1    |   | Form of Common Stock Certificate (incorporated by reference to Exhibit 3.7 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                                                     |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.2    |   | Letter Agreement by and among GulfWest Energy Inc., a Texas corporation, GulfWest Oil & Gas Company and the investors listed on the signature page thereof, dated April 22, 2004 (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K  filed on May 10, 2004)         |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.3    |   | Shareholders Rights Agreement between GulfWest Energy Inc. and OCM GW Holdings, LLC dated February 28, 2005 (incorporated by reference to Exhibit 99(e) of the Schedule 13D, Reg. No. 005-54301,  filed on March 10, 2005)                                                                                       |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.4    |   | Omnibus and Release Agreement among GulfWest Energy Inc., OCM GW Holdings, LLC and those signatories set forth on the signature page thereto, dated as of February 28, 2005 (incorporated by reference to Exhibit 99(f) of the Schedule 13D, Reg. No. 005-54301,  filed on March 10, 2005)                       |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.5    |   | Waiver, Consent and First Amendment to the Shareholders Rights Agreement, dated as of December 7, 2009, between Crimson Exploration Inc. and OCM GW Holdings, LLC (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K  filed December 10, 2009)               |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.6    |   | Termination Agreement, dated as of December 7, 2009, between Crimson Exploration Inc. and OCM GW Holdings, LLC (incorporated by reference to Exhibit 10.4 to the Company’s Current Report on Form 8-K  filed December 10, 2009)                                                                  |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| *10.1  |   | Fifth Amendment dated as of June 9, 2010, to the Amended and Restated Credit Agreement, dated as of May 31, 2007, by and among Crimson Exploration Inc., as borrower, the Guarantors party thereto, the Lenders from time to time party thereto and Wells Fargo Bank, National Association, as administrative agent for the Lenders. |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| #10.2  |   | Employment Agreement between Carl Isaac and Crimson Exploration Inc., dated May 10, 2010 (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed August 5, 2010)                                                                                                             |
|   |   |                                                                                                                                                                                                                                                                                                                                 |

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| Number |   | Description                                                                                                                                        |   |
|--------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|   |   |                                                                                                                                               |
| *31.1  |   | Certification of Chief Executive Officer pursuant to Exchange Rule13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.  |
|   |   |                                                                                                                                               |
| *31.2  |   | Certification of Chief Financial Officer pursuant to Exchange Rule 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|   |   |                                                                                                                                               |
| **32.1 |   | Certification of Chief Executive Officer pursuant to 18.U.S.C Section 1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.              |
|   |   |                                                                                                                                               |
| **32.2 |   | Certification of Chief Financial Officer pursuant to 18.U.S.C Section 1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.              |
|   |   |                                                                                                                                               |
|   |   | * Filed herewith.                                                                                                                                  |
|   |   | ** Furnished herewith                                                                                                                              |
|   |   | # Management contract or compensatory plan or arrangement                                                                                          |

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| Date:  | August 30, 2010 | By:    | /s/ Allan D. Keel                                 |
|--------|-----------------|--------|---------------------------------------------------|
|   |            |   | Allan D. Keel                                     |
|   |            |   | President and Chief Executive Officer             |
|   |            |   |                                              |
| Date:  | August 30, 2010 | By:    | /s/ E. Joseph Grady                               |
|   |            |   | E. Joseph Grady                                   |
|   |            |   | Senior Vice President and Chief Financial Officer |

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|   |   |                                                                                                                                                                                                                                                                                                                                 |   |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| Number |   | Description                                                                                                                                                                                                                                                                                                                          |   |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 3.1    |   | Certificate of Incorporation of Crimson Exploration Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                             |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 3.2    |   | By-laws of Crimson Exploration Inc. (incorporated by reference to Exhibit 3.7 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                                                  |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.1    |   | Form of Common Stock Certificate (incorporated by reference to Exhibit 3.7 to the Company’s Current Report on Form 8-K  filed July 5, 2005)                                                                                                                                                                     |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.2    |   | Letter Agreement by and among GulfWest Energy Inc., a Texas corporation, GulfWest Oil & Gas Company and the investors listed on the signature page thereof, dated April 22, 2004 (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K  filed on May 10, 2004)         |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.3    |   | Shareholders Rights Agreement between GulfWest Energy Inc. and OCM GW Holdings, LLC dated February 28, 2005 (incorporated by reference to Exhibit 99(e) of the Schedule 13D, Reg. No. 005-54301,  filed on March 10, 2005)                                                                                       |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.4    |   | Omnibus and Release Agreement among GulfWest Energy Inc., OCM GW Holdings, LLC and those signatories set forth on the signature page thereto, dated as of February 28, 2005 (incorporated by reference to Exhibit 99(f) of the Schedule 13D, Reg. No. 005-54301,  filed on March 10, 2005)                       |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.5    |   | Waiver, Consent and First Amendment to the Shareholders Rights Agreement, dated as of December 7, 2009, between Crimson Exploration Inc. and OCM GW Holdings, LLC (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K  filed December 10, 2009)               |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| 4.6    |   | Termination Agreement, dated as of December 7, 2009, between Crimson Exploration Inc. and OCM GW Holdings, LLC (incorporated by reference to Exhibit 10.4 to the Company’s Current Report on Form 8-K  filed December 10, 2009)                                                                  |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| *10.1  |   | Fifth Amendment dated as of June 9, 2010, to the Amended and Restated Credit Agreement, dated as of May 31, 2007, by and among Crimson Exploration Inc., as borrower, the Guarantors party thereto, the Lenders from time to time party thereto and Wells Fargo Bank, National Association, as administrative agent for the Lenders. |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| #10.2  |   | Employment Agreement between Carl Isaac and Crimson Exploration Inc., dated May 10, 2010 (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed August 5, 2010)                                                                                                             |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| *31.1  |   | Certification of Chief Executive Officer pursuant to Exchange Rule13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
|   |   |                                                                                                                                                                                                                                                                                                                                 |
| *31.2  |   | Certification of Chief Financial Officer pursuant to Exchange Rule 13a-14(a) as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                   |

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| Number |   | Description                                                                                                                           |   |
|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------|--------|
|   |   |                                                                                                                                  |
| **32.1 |   | Certification of Chief Executive Officer pursuant to 18.U.S.C Section 1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. |
|   |   |                                                                                                                                  |
| **32.2 |   | Certification of Chief Financial Officer pursuant to 18.U.S.C Section 1350 pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. |
|   |   |                                                                                                                                  |
|   |   | * Filed herewith.                                                                                                                     |
|   |   | ** Furnished herewith                                                                                                                 |
|   |   | # Management contract or compensatory plan or arrangement                                                                             |