# Cheat mode

Enter "BAKERSDOZEN" as a profile name to unlock all levels and extras including "Infinite Ammunition", "Super Squad", and "Old Movie" modes.
# 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.
# Speed This The Heck Up

Successfully complete the game on the easy difficulty setting. Choose the last level at the chapter selection screen and play it on a different difficulty setting.
# Squad healing

If your character is killed three consecutive times, you will be given a chance to heal any injuries to your squad. To quickly get to this point, intentionally throw grenades at your own feet.