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| Character select | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L2(4). You will hear a sound when you enter the code correctly. Keep pressing L2 to cycle through the characters available on the current level. Each has special moves different from Konoko, and is a remnant from the network/death match mode that was removed before the game's final release. | ||
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| Hard mode | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, R3, L3, Circle, Square. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Stronger Hits | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, R3, L3, Circle, Square. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Avoid fall damage | 100% | |
| When jumping off or falling from a high area, press L2 close to the ground to flip and not take any damage from the fall. | ||
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| Big characters | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, R3, Square, Circle, L3. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Big head | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, Start, Square, Circle, Start. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Infinite Ammo | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square,L2, L2, L1, L3. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Gatling Guns mode | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L2(2), L1, L3. You will hear a sound when you enter the code correctly. Most weapons will now fire without pausing, and all weapons will have infinite ammunition. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Invincibility | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, R3, L3, R3, Circle. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Level skip | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L3, R3, L2, L1. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Tiny characters | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L3, R3, Square, Circle. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Invisibility | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L1, R3, L2, L3. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Infinite Phase Cloak | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L1, R3, L2, L3. You will hear a sound when you enter the code correctly. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| Fists Of Legend mode | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, R3, L3, Circle, Square. You will hear a sound when you enter the code correctly. This mode makes enemies fly further when punched. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| One-hit kills | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, L3, R3, Circle, Square. You will hear a sound when you enter the code correctly. Konoko can now kill enemies with one hit. Enter the code again to disable its effects. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
| All Ammo and Hypo | 100% | |
| While playing a game, press Select. Highlight "Help", then press L2, L1, L2, Square, Circle, Square, Circle, Circle, Circle, R3. | ||
Was this cheat: (-)Bogus or (+)Helpful | ||
Oni, for the PlayStation 2 computer entertainment system, takes place in a multi-elevation 3D urban jungle designed by architects for maximum realism and consistency. With art drawn by anime specialists and code written by some of the brightest talents in 3D graphics, Oni will undoubtedly challenge players' conceptions of what is possible in a videogame. 
