The following codes are only available after the October 31, 2008 online update has been applied to your game. Once the update has been added and cheat mode activated you will not be able to unlock any achievements. During gameplay press Back to activate your PDA then press LB, RB(2), LB, RB, LB(2), RB(3), LB to enable cheat mode. When you now press 'Back' a message will confirm that the code has been entered correctly and you will be able to add the following codes at the PDA screen while the PMC on the map is highlighted.
Press Up, Down, Left, Right, Left(2).
Press Up, Down, Left, Down, Right(2) (this code will affect both players if enabled during Co-Op mode).
Press Up, Left, Down, Right, Up (this code will affect both players if enabled during Co-Op mode).
Press Up, Right, Down, Left, Up.
Press Up, Down, Left, Right(2), Left.
Press Left, Right(2), Left, Up(2), Left, Up.
All Airstrikes except Nuke:
Press Right, Left, Down, Up, Right, Left, Down, Up.
Press Up(2), Down(2), Left, Right, Left, Right.
Press Up(3), Down(3).
Added by: Sanzano Jun 1st 2010, ID#5858