All weapon upgrades:
Press Start to pause game play, then hold L and press Up(2), Down(2), Left, Right, Left, Right, X, Circle.

. Level select:
Press Start to pause game play, then hold L and press Up(4), Down(4), X(2).

  Advanced Training level:
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Down, Square.

  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.

Final Battle level:
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, Triangle, Up, 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.

  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.

  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.

  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.

My House level:
Press Start to pause game play, then hold L and press Down, X, Down, Triangle, Down, X, Down, X, 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.

Shock Treatment level:
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, Triangle, Up, X, Down, X.

The Basement:
Press Start to pause game play, then hold L and press Down, X, Down, X, Down, X, Down, X, Up, Triangle.

. 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.

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(2), X(2), Square, Circle, Square, Circle, Down, Right.

  Unlimited ammunition:
Press Start to pause game play, then hold L and press Triangle(2), X(2), Square, Circle, Square, Circle, Right, Down.

  Invincibility:
Press Start to pause game play, then hold L and press Up(2), Down(2), Left(2), Right(2), Square, Triangle. When you exit the start menu, "Can't touch this" will appear to confirm correct code entry.
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(2), Down(2), Up, Right, Down, Left, X(2).

  Increased total health:
Press Start to pause game play, then hold L and press Up(2), Down(2), X, Circle, Triangle, Square, X(2).

  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.

  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.

  Crazy Scythe trails:
Press Start to pause game play, then hold L and press Triangle, Up, Circle, Right, X, Down, Square, Left, Triangle, Up.

  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.

  Seep freed movie:
Press Start to pause game play, then hold L and press Left(2), Right(2), Left, Right, Left, Right, X(2).