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.
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.
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.
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.
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 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).
Unlock Big Ears Character
Get a silver or better in the 'Escape From NeoTokyo' challenge in Challenge Mode.
Unlock Pirate Character
Get a silver or better in the 'Trouble At The Docks' challenge in Challenge Mode.
Unlock Viking Character
Get a silver or better in the 'Silent But Deadly' challenge in Challenge Mode.
Unlock Feeder Zombie Character
Get a silver or better in the 'Day Of The Damned' challenge in Challenge Mode.
Unlock Sergio Character
Get a silver or better in the 'Sergio's Last Stand' challenge in Challenge Mode.
Unlock Sewer Zombie Character
Get a silver or better in the 'Fight Off The Living Dead' challenge in Challenge Mode.
Unlock The Hunchback Character
Get a silver or better in the 'Stain Removal' challenge in Challenge Mode.
Unlock Brick Weapon
Get a silver or better in the 'Bricking It' challenge in Challenge Mode.
Unlock Circus Arcade Level
Get a bronze or better in the 'Dam Bursters' challenge in Challenge Mode.
Unlock Robofish Character
Get a silver or better in the 'Dam Bursters' challenge in Challenge Mode.
Unlock Lola Varuska Character
Get a gold or better in the 'Monkey Mayhem' challenge in Challenge Mode.
Unlock Mischief Character
Get a silver or better in the 'Monkey Mayhem' challenge in Challenge Mode.
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 Insect Mutant Character
Get a silver or better in the 'Simian Shooter' challenge in Challenge Mode.
Unlock Cropolite Character
Get a silver or better in the 'Hit Me Baby One Morgue Time' challenge in Challenge Mode.
Unlock R-One-Oh-Seven Charcter
Get a silver or better in the 'Where Do The Batteries Go?' challenge in Challenge Mode.
Unlock Badass Cyborg Character
Get a silver or better in the 'Badass Buspass Impasse' challenge in Challenge Mode.
Unlock Sgt Rock Character
Get a bronze or better in the 'Pick Yer Piece' challenge in Challenge Mode.
Unlock Ample Sally Character
Get a silver or better in the 'Take 'Em Down' challenge in Challenge Mode.
Unlock Wood Golem Character
Get a silver or better in the 'Playing With Fire' challenge in Challenge Mode.
Unlock Private Coal Character
Get a silver or better in the 'Gone Bananas' challenge in Challenge Mode.
Unlock Private Coal Character
Get a silver or better in the 'Banana Chomp' challenge in Challenge Mode.
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.