Full Health:

Pause the game and press Triangle, Triangle, Triangle, Square, Square, Square, Square, Square.

Level Skip:

Pause the game and press Square, Circle, Square, Triangle, Circle, Triangle Triangle, Triangle.

Full Weapon:

Pause the game and press Triangle, Triangle, Square, Square, Circle, Circle, Square, Square.

Show collision boxes:

Pause the game and press Circle, Circle, Circle, Circle, Square, Circle, Circle, Square.