Levels
If you create a profile called BAKERSDOZEN, it will unlock all of the levels in the game.

Black And White Mode
Clear Easy difficulty to unlock the "Old Movie" cheat. This basically allows the game to be played in black and white.

Infinite Ammo
Clear the game on normal difficulty to unlock infinite ammo. This cheat needs to be "reactivated" at the start of each level, if the player is killed, or he retries.

Authentic Mode
Clear the game on the hardest difficulty. This mode has no checkpoints, saves, icons nor reticules.

Super Squad
Play and complete the game on Authentic Mode to unlock the super squad cheat.