Killing Zone
At the main menu, hold L1 + R2 + Circle + Start for five seconds. Then, select single player mode and choose any character.
Play tracks 2 through 34 of the game disc in an audio CD player.
| Enable Code (Must Be On) | 80083F2C 00C8 |
| Infinite Time | 8008F7D3 0063 |
| Player 1 Codes | |
| Infinite Energy | 8008F9EC 0200 |
| 75% Energy | D008F9EC 0200 8008F9EC 0180 |
| 50% Energy | D008F9EC 0200 8008F9EC 0100 |
| 25% Energy | D008F9EC 0200 8008F9EC 0080 |
| No Energy | 8008F9EC 0000 |
| 1-Hit Death | D008F9EC 0200 8008F9EC 0001 |
| Player 2 Codes | |
| Infinite Energy | 8008F9F0 0200 |
| 75% Energy | D008F9F0 0200 8008F9F0 0180 |
| 50% Energy | D008F9F0 0200 8008F9F0 0100 |
| 25% Energy | D008F9F0 0200 8008F9F0 0080 |
| No Energy | 8008F9F0 0000 |
| 1-Hit Death | D008F9F0 0200 8008F9F0 0001 |
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