Expert Mode

Select "Credits" at the options screen then press Down(3), Triangle, Down(3), Square, Left, Right for more challenging opponents.

All Weapons

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Up, Circle.

Infinite Health

Select "Credits" at the options screen then press L1,Triangle, Up, Down, Circle, Circle, Triangle, Square, Right, Square

Infinite Ammunition

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2)

Instant Puzzle Solution

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2), Down(3), Up.

One Hit Kills With Firearm

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Down, R1.

One Hit Kill With Smack-Jack, Knife, or Brass Knuckle

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Down, L1.

Rapid Fire

Select "Credits" at the options screen then press L1, Triangle, Up, Down, Circle(2), Up(3), Down.