| Game | Cheats List | |||
| Of Orcs and Men | Hints | |||
| Omega Five | Hints | |||
| Omerta: City of Gangsters | Hints | |||
| Onechanbara: Bikini Samurai Squad | Hints | |||
| Oneechanbara vorteX | Hints | |||
| Open Season | Hints | |||
| Operation Darkness | Hints | |||
| Operation Flashpoint: Dragon Rising | Cheat Codes, Hints | |||
| Operation Flashpoint: Red River | Hints | |||
| Orcs Must Die! | Hints | |||
| Otomedius Excellent | Hints | |||
| Otomedius G | Hints | |||
| Ougon Musou Kyoku X | Hints | |||
| Outland | Hints | |||
| Outpost Kaloki X | Hints | |||
| OutRun Online Arcade | Hints | |||
| Over G Fighters | Hints | |||
| Overlord | Hints | |||
| Overlord II | Hints | |||
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