----

----

----

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|   | BORROWER:                                                  |
|--------|------------------------------------------------------------|
|   |                                                       |
|   | CRIMSON EXPLORATION INC.,                                  |
|   | a Delaware corporation                                     |
|   |                                                       |
| By:    | /s/ E. Joseph Grady                                        |
|   | E. Joseph Grady                                            |
|   | Senior Vice President and                                  |
|   | Chief Financial Officer                                    |
|   |                                                       |
|   | GUARANTOR:                                                 |
|   |                                                       |
|   | CRIMSON EXPLORATION OPERATING, INC.,a Delaware corporation |
|   |                                                       |
| By:    | /s/ E. Joseph Grady                                        |
|   | E. Joseph Grady                                            |
|   | Senior Vice President and                                  |
|   | Chief Financial Officer                                    |

----

|   | AGENT AND LENDER:                      |
|--------|----------------------------------------|
|   |                                   |
|   | WELLS FARGO BANK, NATIONAL ASSOCIATION |
|   |                                   |
|   |                                   |
| By:    | /s/ Shiloh Davila                      |
| Name:  | Shiloh Davila                          |
| Title: | Assistant Vice President               |

----

|   | LENDERS:                       |
|--------|--------------------------------|
|   |                           |
|   | THE ROYAL BANK OF SCOTLAND plc |
|   |                           |
|   |                           |
| By:    | /s/ Lucy Walker                |
| Name:  | Lucy Walker                    |
| Title: | Vice President                 |

----

|   | FORTIS CAPITAL CORP.   |
|--------|------------------------|
|   |                   |
| By:    | /s/ Douglas R. Liftman |
| Name:  | Douglas R. Liftman     |
| Title: | Managing Director      |
|   |                   |
|   |                   |
|   |                   |
| By:    | /s/ Betsy Jocher       |
| Name:  | Betsy Jocher           |
| Title: | Director               |
|   |                   |
|   |                   |
|   |                   |
|   | BNP PARIBAS            |
|   |                   |
| By:    | /s/ Douglas R. Liftman |
| Name:  | Douglas R. Liftman     |
| Title: | Managing Director      |
|   |                   |
|   |                   |
|   |                   |
| By:    | /s/ Betsy Jocher       |
| Name:  | Betsy Jocher           |
| Title: | Director               |

----

|   | REGIONS BANK            |
|--------|-------------------------|
|   |                    |
|   |                    |
| By:    | /s/ Kelly L. Elmore III |
| Name:  | Kelly L. Elmore III     |
| Title: | Senior Vice President   |

----

|   | BANK OF TEXAS, NA     |
|--------|-----------------------|
|   |                  |
|   |                  |
| By:    | /s/ Trudy W. Nelson   |
| Name:  | Trudy W. Nelson       |
| Title: | Senior Vice President |