Oni Cheats Codes for PS2: Infinite ammunition
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L2(2), L1, L3.You will hear a beep while you finish entering the code. It means your code is correct. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Infinite Phase Cloak
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L1, R3, L2, L3.You will hear a beep while you finish entering the code. It means your code is correct. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Refill hypo
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, Circle(3), R3.You will hear a beep while you finish entering the code. It means your code is correct.

Oni Cheats Codes for PS2: Gatling Guns mode
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L2(2), L1, L3.You will hear a beep while you finish entering the code. It means your code is correct. Most weapons will now fire without pausing, and all weapons will have infinite ammunition. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Fists Of Legend mode
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, R3, L3, Circle, Square.You will hear a beep while you finish entering the code. It means your code is correct. This mode makes enemies fly further when punched. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: One-hit kills
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L3, R3, Circle, Square.You will hear a beep while you finish entering the code. It means your code is correct. Konoko can now kill enemies with one hit. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Character select
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L2(4).You will hear a beep while you finish entering the code. It means your code is correct. 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.

Oni Cheats Codes for PS2: Tiny characters
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, L3, R3, Square, Circle.You will hear a beep while you finish entering the code. It means your code is correct. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Big characters
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, R3, Square, Circle, L3.You will hear a beep while you finish entering the code. It means your code is correct. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Big head
Pause the while it is running by press the select button. Highlight "Help". Press L2, L1, L2, Square, Circle, Square, Start, Square, Circle, Start.You will hear a beep while you finish entering the code. It means your code is correct. Enter the code again to disable its effects.

Oni Cheats Codes for PS2: Avoid fall damage
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.