| Game Title | | Console | | Cheat Title |
| Omega Boost | | PS One | | Inner Level E |
| Omega Boost | | PS One | | Control loading screen |
| One | | PS One | | Debug mode |
| One | | PS One | | Level select |
| One | | PS One | | All weapons |
| One | | PS One | | Full pause screen |
| One | | PS One | | Level passwords |
| One Must Fall: Battlegrou... | | PC | | Escalation Story Tourname... |
| One Must Fall: Battlegrou... | | PC | | HAR Master (Mantis) Tourn... |
| One Must Fall: Battlegrou... | | PC | | HAR Master (Warlord) Tour... |
| One Must Fall: Battlegrou... | | PC | | HAR Master(Gargoyle) Tour... |
| One Must Fall: Battlegrou... | | PC | | HAR Master(Jaguar) Tourna... |
| One Must Fall: Battlegrou... | | PC | | IFL Cup Tournament |
| One Must Fall: Battlegrou... | | PC | | Multiplicity Story Tourna... |
| One Must Fall: Battlegrou... | | PC | | Redemption Story Tourname... |
| One Must Fall: Battlegrou... | | PC | | Transition Story Tourname... |
| One Must Fall: Battlegrou... | | PC | | Ultimate Warrior Tourname... |
| One Must Fall: Battlegrou... | | PC | | World Open Tournament |
| One Piece Mansion | | PS One | | Play as Puchika |
| Oneechanbara, The | | Playstation 2 | | All bonuses |
| Oneechanbara, The | | Playstation 2 | | Hard difficulty |
| Oneechanbara, The | | Playstation 2 | | Violent difficulty |
| Oneechanbara, The | | Playstation 2 | | Costume 2 |
| Oneechanbara, The | | Playstation 2 | | Costume 3 |
| Oneechanbara, The | | Playstation 2 | | Costume 4 |
| Oneechanbara, The | | Playstation 2 | | Costume 5 |
| Oneechanbara, The | | Playstation 2 | | Costume 6 |
| Oneechanbara, The | | Playstation 2 | | Wallpaper 2 |
| Oneechanbara, The | | Playstation 2 | | Wallpaper 3 |
| Oni | | Playstation 2 | | Level skip |
| Oni | | Playstation 2 | | Invincibility |
| Oni | | Playstation 2 | | Infinite ammunition |
| Oni | | Playstation 2 | | Infinite Phase Cloak |
| Oni | | Playstation 2 | | Refill hypo |
| Oni | | Playstation 2 | | Gatling Guns mode |
| Oni | | Playstation 2 | | Fists Of Legend mode |
| Oni | | Playstation 2 | | One-hit kills |
| Oni | | Playstation 2 | | Character select |
| Oni | | Playstation 2 | | Tiny characters |
| Oni | | Playstation 2 | | Big characters |
| Oni | | Playstation 2 | | Big head |
| Oni | | Playstation 2 | | Avoid fall damage |
| Oni | | PC | | Cheat Codes |
| Oni | | PC | | Developer mode |
| Onimusha 2 | | Playstation 2 | | Easy mode |
| Onimusha 2 | | Playstation 2 | | Hard mode |
| Onimusha 2 | | Playstation 2 | | Kick ass mode |
| Onimusha 2 | | Playstation 2 | | Ending bonuses |
| Onimusha 2 | | Playstation 2 | | Critical mode |
| Onimusha 2 | | Playstation 2 | | Strongest equipment mode |
| Onimusha 2 | | Playstation 2 | | Mind twister mode |
| Onimusha 2 | | Playstation 2 | | Jubei's alternate costume |
| Onimusha 2 | | Playstation 2 | | Oyu's alternate costume |
| Onimusha 2 | | Playstation 2 | | Easy Issen attacks |
| Onimusha 2 | | Playstation 2 | | Easy gold and souls |
| Onimusha 3: Demon Siege | | Playstation 2 | | Michelle's alternate cost... |
| Onimusha 3: Demon Siege | | Playstation 2 | | Michelle's second alterna... |
| Onimusha 3: Demon Siege | | Playstation 2 | | Jacuqe's alternate costum... |
| Onimusha 3: Demon Siege | | Playstation 2 | | Panda costume |
| Onimusha 3: Demon Siege | | Playstation 2 | | Alternate ending sequence |
| Onimusha 3: Demon Siege | | Playstation 2 | | Easy difficulty |
| Onimusha 3: Demon Siege | | Playstation 2 | | Hard difficulty |
| Onimusha 3: Demon Siege | | Playstation 2 | | Critical (Issen) mode |
| Onimusha 3: Demon Siege | | Playstation 2 | | Oni Hard mode |
| Onimusha 3: Demon Siege | | Playstation 2 | | Ultimate mode |
| Onimusha 3: Demon Siege | | Playstation 2 | | Original Onimusha swords |
| Onimusha 3: Demon Siege | | Playstation 2 | | Bishamon sword |
| Onimusha 3: Demon Siege | | Playstation 2 | | Oni Musou |
| Onimusha 3: Demon Siege | | Playstation 2 | | Adventures of Heihachi (H... |
| Onimusha 3: Demon Siege | | Playstation 2 | | Oni Shooting mini-game |
| Onimusha 3: Demon Siege | | Playstation 2 | | Genma Puzzle mini-game |
| Onimusha 3: Demon Siege | | Playstation 2 | | Secret training mode mini... |
| Onimusha 3: Demon Siege | | Playstation 2 | | Ako's Black Haori |
| Onimusha 3: Demon Siege | | Playstation 2 | | Skip FMV sequences |
| Onimusha 3: Demon Siege | | Playstation 2 | | Regain health |
| Onimusha 3: Demon Siege | | Playstation 2 | | Infinite Genma Souls |
| Onimusha 3: Demon Siege | | Playstation 2 | | Bypass Dark Realms |
| Onimusha 3: Demon Siege | | Playstation 2 | | Defeating Guard Dog |
| Onimusha 3: Demon Siege | | Playstation 2 | | Defeating Nobunaga |
| Onimusha 3: Demon Siege | | Playstation 2 | | Use less magic during mag... |
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