Enter "2ndsquad" as a profile name in North American version of the game to unlock all levels and extras including "Infinite Ammunition", "Super Squad", and "Old Movie" modes. Alternately, enter "BAKERSDOZEN" as a profile name.Old Movie mode
Successfully complete the game on the Easy difficulty setting to unlock Old Movie mode. This mode allows the game to be played in black and white.Infinite Ammunition
Successfully complete the game on the Normal difficulty setting to unlock the "Infinite Ammunition" option.Authentic mode
Successfully complete the game on the Hard difficulty setting to unlock the Authentic difficulty setting. This mode has no checkpoints, saves, icons nor reticules.Super Squad
Successfully complete the game in Authentic mode to unlock the "Super Squad" option.Full team health
Die four times after a save point and you will be asked if you want to heal your squad.