Successfully complete the indicated task to unlock the corresponding costumes:
- Dance: Successfully complete Story mode on 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: Successfully complete the backstory.
- White Pajamas: Perform a 100-hit combo.
- Wildman: Successfully complete Story mode on the Hard difficulty.
- Yellow Jump Suit: Kill 100 enemies.
Successfully complete the indicated task to unlock the corresponding concept art:
- 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.
- Concept Art #6: Get 100 kills with the Uzi.
Use the handguns to shoot off the screen to kill enemies that are active, but not visible yet. Note: This does not always work.Steam achievements
Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.
- And it continues: Successfully complete the Single Player Campaign on Normal mode.
- Backstory: Successfully complete Co-op Campaign mode.
- Father forgive me...: Defeat the priest.
- Grindhouse: Get 100 Chainsaw kills.
- I'm just that good: Successfully complete the Single Player Campaign on Hard mode.
- Just getting started: Take out 20 enemies.
- Making a name for yourself: Take out 100 enemies.
- Mow 'em Down: Take out 1,000 enemies.
- Revenge is Sweet: Defeat Cesar.
- Scars from the past: Defeat Cassandra.
- The Meating: Defeat the Butcher.
- The Wrong Guy: Defeat El Raton.