Unlock Levels
Create a profile called "BAKERSDOZEN" and all the levels in the game will be unlocked.
Hints
Unlock Old Movie
Beat the game on Normal difficulty setting.
Unlock Unlimited Ammo
Beat the game on Normal difficulty setting.
Unlock Super Squad
Complete game on Authentic mode.
Authentic Mode
Successfully complete the game under the difficult difficulty setting. This mode has no checkpoints, saves, icons nor reticules.
Speed This The Heck Up
Simply beat the game once on Easy. Then go to chapter select and play the very last level on a different difficulty level this will award you with that cheat.
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.