Start a game, kill the first two aliens and enter the room from which they came from. Then, enter one of the following codes:
Hold L1 + L2 + R1 + R2 + Triangle and then quit your current game. If you entered the code correctly, you will see a green light. Then, go to the opening screen where you can now choose a starting level from 1 to 16.
Hold L1 + L2 + R1 + R2 + X. If you entered the code correctly, you will see a blue light.
Hold L1 + L2 + R1 + R2 + Circle. If you entered the code correctly, you will see a red light.
| Infinite Energy | 80083238 FF00 |
| Lasers Never Overheat | 80083740 0000 |
| Slow Motion | 80080B98 23EF |
| Infinite Machine Gun | 8008316C 0FFF |
| Infinite Grenade Launcher | 800832AC 00FF |
| Infinite Rocket Launcher | 80083344 00FF |
| Infinite Rail Gun | 80083446 00FF |
| Have Machine Gun | 8007AB2C 010A |
| Have Grenade Launcher [Note] | 8007AB3C 010D |
| Have Dual Grenade Launchers [Note] | 8007AB3C 010E |
| Have Triple Grenade Launchers [Note] | 8007AB3C 010F |
| Have Rocket Launcher | 8007AB4C 0110 |
| Have Rail Gun | 8007AB6C 010C |
| Secondary Weapon Modifier | 80083760 00?? |
| Primary Weapon Modifier | 8007AB0C 00?? |
| Infinite Primary, Secondary Weapons, and Level Select | 8007AB5C 0616 |
| Single Shot Laser Position Modifier | 80083760 000? |
| Quantity Digits to Accompany Secondary Weapon Modifier Code | |
| 00 - N/A 01 - Double Blue Laser 02 - Double Green Laser 03 - Triple Blue Laser 04 - Triple Green Laser 05 - Quad Blue Laser 06 - Quad Green Laser 07 - Plasma Cannon 0A - Machine Gun 0C - Rail Gun 0D - Grenade Launcher 0E - Dual Grenade Launchers 0F - Triple Grenade Launchers 10 - Rocket Launcher | |
| Quantity Digits to Accompany Primary Weapon Modifier Code | |
| 00 - N/A 01 - Double Blue Laser 02 - Double Green Laser 03 - Triple Blue Laser 04 - Triple Green Laser 05 - Quad Blue Laser 06 - Quad Green Laser | |
| Quantity Digits to Accompany Single Shot Laser Position Modifier Code | |
| 0 - Bottom Right 1 - Top Right 2 - Top Left 3 - Bottom Left |
Note: Do not use these codes together.
