1853 Wild West Level Rewards
Successfully complete the 1853 Wild West level in story mode on the medium difficulty setting to unlock The Colonel as a playable character in arcade mode.
1895 Notre Dame Level Rewards
Successfully complete the 1895 Notre Dame level in story mode on the medium difficulty setting to unlock Jacque de la Mourte as a playable character in arcade mode.
1920 Aztec Ruins Level Rewards
Successfully complete the 1920 Aztec Ruins level in story mode on the medium difficulty setting to unlock Stone Golem as a playable character in arcade mode.
1932 Chicago Level Rewards
Successfully complete the 1932 Chicago level in story mode on the medium difficulty setting to unlock Big Tony as a playable character in arcade mode.
1972 Atom Smasher Level Rewards
Successfully complete the 1972 Atom Smasher level in story mode on the medium difficulty setting to unlock Khallos as a playable character in arcade mode.
1990 Siberia Level Rewards
Successfully complete the 1990 Siberia level in story mode on the medium difficulty setting to unlock Hybrid Mutant as a playable character in arcade mode.
2019 NeoTokyo Level Rewards
Successfully complete the 2019 NeoTokyo level in story mode on the medium difficulty setting to unlock Sadako as a playable character in arcade mode.
2280 Return To Planet X Level Rewards
Successfully complete the 2280 Return to Planet X level in story mode on the medium difficulty setting to unlock Ozor Mox as a playable character in arcade mode.
2315 Robot Factory Level Rewards
Successfully complete the 2315 Robot Factory level in story mode on the medium difficulty setting to unlock The Machinist as a playable character in arcade mode.
2401 SpaceStation Level Rewards
Successfully complete the 2401 SpaceStation level in story mode on the medium difficulty setting to unlock Reaper Splitter as a playable character in arcade mode.
Arcade Adios Amigos Level Rewards
Successfully complete the Arcade Adios Amigos level with a "Gold" rank to unlock Hector Babasco and Lean Molly as playable characters in arcade mode.
Challenge Pane In The Neck Level Rewards
Successfully complete the Challenge Pane In The Neck level with a "Silver" rank to unlock the Rotating Heads cheat.
Ending Bonuses
Successfully complete the game on the easy difficulty setting to unlock the Cardboard Characters cheat and Streets level in arcade mode.
Get All Characters Cloaked Cheat
Successfully complete story mode on the medium difficulty setting.
Get Big Heads Cheat
Successfully complete the game on the medium difficulty setting.
Get Lean Molly & Hector Babasco
Use arcade mode and get a gold medal in Adios Amigos.
Get Rotating Heads Cheat
Beat the pane in the Neck in Silver (Challenge Mode).
Get Rotating Heads Cheat
Successfully complete the game on the medium difficulty setting.
Get Unlimited Ammo Cheat
Successfully complete story mode on the hard difficulty setting.
Quick Reloading/Cooling
Sometimes when a weapon needs reloading or cooling down, simply change weapons and change back (from the Pause menu) and you will reload/cool the weapon automatically.
Unlock Compound Multiplayer Map
Successfully complete story mode on the medium difficulty setting.
Unlock Honorary and Elite League
Get a bronze or better on all Amateur League minigames to get the Honorary League games, Get a bronze or better on all Honorary League minigames to get the Elite League.
Unlock Paintball Cheat
Get a bronze or better on all the challenges in the Challenge Mode.
Unlock Site Multiplayer Map
Successfully complete story mode on the hard difficulty setting.