Mission Select Pause the games, choose the "Option" selection, highlight the "Select Mission" option, then press Left, R1, L1, Select, Square, and X. Super Ammo for Silenced 9mm Pause the game, highlight the "Silenced 9mm" under the "Weapons" option, then hold Left, L1, R2, Select, Square, and X (simultaneously). If done correctly, Gabe will say "Understood". Expert Mode While you are at the title screen, hold Left, L1, R2, Select, Square, Circle, and X (simultaneously). If done correctly, "Damn it" will be spoken. All Weapons and Infinite Ammo Pause the game, highlight the "Weapons" option, then press Right, L2, R2, Circle, Square, and X. NOTE: Only the weapons normally available during the current level will become selectable. Weak Enemies Pause the game, highlight the "Map" option, then press Right, L2, R1, X. If done correctly, you will hear a laugh.