Pause the game, hold L + R and press Down, A, X, Black, A. When "Enter Cheat" appears onscreen... you guessed it:
| X, Y, A, B, L, X | Turn Shellshock Off |
| Right, Left, R, L, X, Y | Kill Nemesis |
| Black, L, Black, R, Up, Y | Clear HUD |
| A, B, R, White, Black, L | Get OSS Document |
| B, R, White, Y, L,White | Suicide (Single Player) |