Press Start to pause game play, then hold L and press Up, Up, Up, Up, Down, Down, Down, Down, X, X.
All weapon upgrades
Press Start to pause game play, then hold L and press Up, Up, Down, Down, Left, Right, Left, Right, X, Circle.
Basic Training level
Press Start to pause game play, then hold L and press Up, Triangle, Up, X, Down, X, Down, X, Down, X.
Big Trouble in Little Downtown level
Press Start to pause game play, then hold L and press Up, Triangle, Down, X, Down, X, Down, X, Down, X.
Bottom of the Bell Curve level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Down, Triangle.
Burn it Down level
Press Start to pause game play, then hold L and press Down, X, Up, Triangle, Down, X, Down, X, Down, X.
Advanced Training level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Down, Square.
Happy Trails Insanitarium level
Press Start to pause game play, then hold L and press Down, X, Down, Triangle, Up, X, Down, X, Down, X.
Growth Spurt level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Up, X.
Final Battle level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, Triangle, Up, X.
Higher Learning level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, Triangle, Down, X.
How a Cow Becomes a Steak level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, Triangle, Down, X, Down, X.
Inner Madness Level
Press Start to pause game play, then hold L and press Down, X, Down, X, Up, Triangle, Down, X, Down, X.
Into the Box level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Up, Triangle, Down, X.
Seep's Hood level
Press Start to pause game play, then hold L and press Down, Triangle, Down, X, Down, X, Down, X, Down, X.
Moving on Up level
Press Start to pause game play, then hold L and press Down, Triangle, Up, X, Down, X, Down, X, Down, X.
Shock Treatment level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, Triangle, Up, X, Down, X.
My House level
Press Start to pause game play, then hold L and press Down, X, Down, Triangle, Down, X, Down, X, Down, X.
The Burger Tram level
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Up, X, Down, X.
Cheats submited by Jim on November, 25, 2006
The Corner Store level
Press Start to pause game play, then hold L and press Down, X, Up, X, Down, X, Down, X, Down, X.
The Museum level
Press Start to pause game play, then hold L and press Up, X, Down X, Down, X, Down, X Down, X.
Udder Madness level
Press Start to pause game play, then hold L and press Down, X, Down, X, Up, X, Down, X, Down, X.
Refill ammunition
Press Start to pause game play, then hold L and press Triangle, Triangle, X, X, Square, Circle, Square, Circle, Down, Right.
Invincibility
Press Start to pause game play, then hold L and press Up, Up, Down, Down Left, Left, Right, Right, Square, Triangle. When you exit the start menu, "Can't touch this" will appear to confirm correct code entry.
Unlimited ammunition
Press Start to pause game play, then hold L and press Triangle, Triangle, X, X, Square, Circle, Square, Circle, Right, Down.
Disable gates
Press Start to pause game play, then hold L and press Up, Left, Down, Right, Left, Triangle, Square, X, Circle, Square.
Increased assist stocks
Press Start to pause game play, then hold L and press Up, Up, Down, Down, Up, Right, Down, Left, X, X.
Increased total health
Press Start to pause game play, then hold L and press Up, Up, Down, Down, X, Circle, Triangle, Square, X, X.
One more weapon widget
Press Start to pause game play, then hold L and press Right, Up, Down, Up, Triangle, Up, Left, Square, Triangle, Right.
Extra violent kills
Press Start to pause game play, then hold L and press Circle, Left, X, Up, Square, Right, Triangle, Down, X, Up.
Crazy Scythe trails
Press Start to pause game play, then hold L and press Triangle, Up, Circle, Right, X, Down, Square, Left, Triangle, Up.
Big head mode
Press Start to pause game play, then hold L and press Triangle, Circle, X, Square, Triangle, Up, Right, Down, Left, Up.
Big scythe mode
Press Start to pause game play, then hold L and press Triangle, Square, X, Circle, Triangle, Up, Left, Down, Right, Up.
Seep freed movie
Press Start to pause game play, then hold L and press Left, Left, Right, Right, Left, Right, Left, Right, X, X.
Random color Scythe trails
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Down, X.
Cheats submited by Jack on November 25, 2006