X0206 3 2013-03-05 0 0000813779 CRIMSON EXPLORATION INC. CXPO 0001571650 JANSEN PAUL FRANCISCUS C/O CRIMSON EXPLORATION INC. 717 TEXAS AVE., SUITE 2900 HOUSTON TX 77002 0 1 0 0 Controller/Chief Acctg Officer Common Stock 13400 D Employee Stock Option (Right to Buy) 2.67 2022-01-16 Common Stock 20000 D Includes 10,400 shares of restricted stock of the Issuer granted pursuant to the Issuer's Long-Term Incentive Compensation Plan. Of these 10,400 shares of restricted stock, 25% will vest on each of March 8, 2014, 2015, 2016 and 2017 should the reporting person remain an employee of the Issuer on the pertinent vesting date absent earlier vesting pursuant to the terms of the stock award agreement. The reported stock option shares will become vested and exercisable with respect to 15% of the shares on the first anniversary of the date of grant (i.e. January 16, 2012) and thereafter at the end of each full succeeding year as follows: 25% on the second anniversary, 25% on the third anniversary and 35% on the fourth anniversary at which time the stock option shares will be fully vested and exercisable with respect to 100% of such shares. This Form 3 has been signed by John A. Thomas, Secretary for Crimson Exploration Inc., on behalf of Mr. Jansen pursuant to an instrument of Power of Attorney dated March 8, 2013. The authority granted pursuant to such instrument is to remain in full force and effect until rescinded in writing by Mr. Jansen. /s/ John A. Thomas 2013-03-11