Type in the code during gameplay. A small window will appear telling you the code worked. Note: Codes disable trophies until you restart the game.
Up, Up, Down, Down, Left, Right, Left, Right, A, B - All Weapons
Up, Up, Left, Right, Left, Right, Down, Down, R1, X - Gawd Mode (Invincibility)
Left, Left, Up, Down, Right, Right, Up, Down, RB, A - Super Stomp
Left, Left, Right, Right, Up, Down, Up, Down, A, B - Unlock All Styles
CARBONI - Anthony Carboni
DTOID - Destructoid Staff
ELECPLAY - Electric Playground Staff
EMT - Epic Meal Time Staff
GAIJIN - Gaijin Games Staff
ROMERO - John Romero
MAXIMEAMIS - Maxime's Friends
MOJANG - Mojang Staff
POWER - Nintendo Power Staff
PJFP - Phil Guerrero
URNOTE - Playstation Blog Staff
POLYTRON - Polytron Staff
TEAMMEAT - Team Meat Staff
Manly Mullet - Earn this glorious crown by completing all Slaughter Spree Arcade Challenges with gold medal scores.
Pixel Pants & Pumps - Complete Story Mode to get in these pants.
Pleather Pixel Jacket - Play Story Mode for a bit to win it, buy the full game to keep it. That's how these work, right?
Broken Chain 25 Reach a 99X chain multiplier
Eco-friendly Fire 10 Hit 4 people with a single shotgun blast
8-Blow 15 Blow up 8 vehicles in 8 seconds
Rocky Road Tire Crunch 15 Hit 25 pedestrians in a row with your car without stopping
Pixel Me Rollin' 10 Drive 65,536 pixels
Bike Bounce 10 Knock a pedestrian off a bike to ricochet another off their bike
Three Flings 10 Knock down two pedestrians with a third using the BioClaw
8-bit Hydrant Overflow 30 Put 256 people on fire within a single life
Dance Player, Dance! 30 Avoid the cops at maximum threat level for 1 minute on foot, without taking damage
Daily Grind 30 Find all hidden loot bags, payphones and invisible walls
The Cosplayer 25 Dress up as one of the guest stars
Big Money! 10 Match all cards in a single round of the casino game at the Spades To Steal Casino
You Broke The Law! 5 Raise your threat level causing police to chase you
Killabunga! 5 Kill four green sewer dwellers
Feeling Groggy 10 Get "sick" on "milk"
Master of Your Domain 10 Dethrone GLC's high score
Death Cam, No Death 50 Beat Death Cam VHS without dying
Tool Time 30 Collect all 7 time machine parts
Super Turbo Beat Down 50 Beat Turbo Story Mode
A Winner Is You! 20 Get gold medal scores in all sprees