To unlock more costumes, successfully complete the single-player campaign. Then, at the title screen, press Up(2), Down(2), Left, Right, Left, Right, Circle, X, Start. The bonus costumes will now be available at the “Unlocks” menu.
Successfully complete Story mode. Pause game play in any level, then press Up, Square, Down, Circle, Left, Triangle, Right, X at the “View Unlocks” screen.
Unlock the following costumes by performing the corresponding tasks:
COSTUME – HOW TO UNLOCK
Dance – Complete the single player campaign under the Normal difficulty.
Gimp – Kill 500 creatures.
Horror – Kill 100 enemies with a chainsaw.
Mow ’em Down – Get 1,000 total kills.
Red Pajamas – Perform a 150-hit combo
Spartan – Complete the backstory.
White Pajamas – Perform a 100-hit combo.
Wildman – Complete the single player campaign under the Hard difficulty.
Yellow Jump Suit – Kill 100 enemies.
Unlock the following concept art by performing the corresponding tasks:
CONCEPT ART – HOW TO UNLOCK
Concept Art #1 – Get 100 shank kills.
Concept Art #2 – Get 100 kills with the chains.
Concept Art #3 – Get 100 kills with dual pistols.
Concept Art #4 – Get 100 kills with the katana.
Concept Art #5 – Get 100 kills with grenades.
Use the handguns to shoot off the screen to kill enemies that are active, but not visible yet.
The Wrong Guy – Defeat El Raton.
The Meating – Defeat The Butcher.
Scars from the past – Defeat Cassandra.
Revenge is Sweet – Defeat Cesar.
Just getting started – Take out 20 enemies.
Making a name for yourself – Take out 100 enemies.
Grindhouse – 100 Chainsw kills.
And it continues – Complete Single Player Campaign on Normal Mode.
Backstory – Complete Co-op Campaign Mode.
Father forgive me… – Defeat The Priest.
Mow ’em Down – Take out 1000 enemies.
I’m just that good – Complete Single Player Campaign on Hard Mode.