At the main menu, hold Left + Square + L1 + L2 + R1 + R2. If you entered the code correctly, the words "Cheat Mode" will appear at the bottom of the screen. Then, enter the options screen to access an invincibility and stage select option.
Pause the game and press Right, Square, Triangle, Square, Triangle, X.
Beat the game on each difficulty setting. Play the game once more, under the hard difficulty setting. Enter "NUD" as initials after completing the game. Then, Mace and Alana will appear to be nude during the next game.
After completing a level and viewing the destruction bonus, quickly move to the exit. If done correctly, the screen will flash and you will hear a sound. Then a shotgun or handgun will appear when the next level begins. If the game is in two player mode, each player will receive either weapon.
| Reverse Joker Command | 80093A10 ???? |
| Infinite Health P1 | 800B435A 017C |
| Infinite Health P2 | 800B444E 017C |
| Infinite Credits | 80093D50 0009 |
| Infinite Ammo Rocket Launcher | 800254D8 0000 800254DA 0000 |
| Infinite Ammo Hand Gun | 8002540C 0000 8002540E 0000 |
| Infinite Ammo Shotgun | 8002559C 0000 8002559E 0000 |
| Infinite Ammo Cannon | 80025550 0000 80025552 0000 |
| Cheat Mode | 80093D63 0002 |
| Weapon Available | 800B4396 0000 800B4396 0001 800B4396 0003 |
| Lots of Special Attacks | D0093A16 FFFF 80024F3C 0000 80024F3E 0000 |