Bonus costumes:
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.
DeathSpank costume:
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.
Alternate costumes:
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.
Concept art:
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.
Early kills:
Use the handguns to shoot off the screen to kill enemies that are active, but not visible yet.
Trophies:
Bronze trophies
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.
Silver trophies
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.
Gold trophies
I’m just that good – Complete Single Player Campaign on Hard Mode.