| Game | Cheats List | |||
| O | Cheats | |||
| Oasis: Definitely Maybe | Cheats | |||
| O Brother, Where Art Thou? | Cheats | |||
| Ocean's 11 | Cheats | |||
| Octopus 2: River of Fear | Cheats | |||
| Oh Brother, Where Art Thou? | Cheats | |||
| Ohh Nooo!!! Mr. Bill's Classics! | Cheats | |||
| Oh My Goddess! Volume 1 | Cheats | |||
| Oh My Goddess! Volume 2 | Cheats | |||
| Oingo Boingo: Farewell | Cheats | |||
| Old School | Cheats | |||
| Olga Triple Feature | Cheats | |||
| Olive, the Other Reindeer | Cheats | |||
| Once Upon a Time in China 3 | Cheats | |||
| Once Upon a Time in the West | Cheats | |||
| One Night At McCool's | Cheats | |||
| One Perfect Day | Cheats | |||
| On the Line | Cheats | |||
| On the Road With the Dropkick Murphys | Cheats | |||
| Open Season | Cheats | |||
| Orbital: The Altogether DVD | Cheats | |||
| Organ | Cheats | |||
| Orgazmo | Cheats | |||
| Orphen Volume 3: Ruins and Relics | Cheats | |||
| Orphen Volume 4: Mystere | Cheats | |||
| Osmosis Jones | Cheat Codes, Goofs | |||
| Otaku no Video | Cheats | |||
| Out of Sight | Cheats | |||
| Oz: The Complete First Season | Cheats | |||
| Oz: The Complete Second Season | Cheats | |||
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