All single player levels: Select the "Cheats" option at the in-game menu (during a level), then enter "happycamper" as a code. All cooperative levels: Select the "Cheats" option at the in-game menu (during a level), then enter "wanderlust" as a code. Unlimited ammunition: Select the "Cheats" option at the in-game menu (during a level), then enter "packmule" as a code. All FMV sequences: Select the "Cheats" option at the in-game menu (during a level), then enter "filmcritic" as a code.