PlayStation 3 - O
- Oblivion
- Obut Pétanque
- Obut Pétanque 2
- Oddworld - Abe's Oddysee - New 'n' Tasty
- Oddworld - Munch's Oddysee HD
- Oddworld - Stranger's Wrath HD
- Oddworld - Strangers Vergeltung
- Of Orcs and Men
- Okabu
- Okami HD
- OlliOlli
- One Piece - Pirate Warriors
- One Piece - Pirate Warriors 2
- One Piece - Pirate Warriors 3
- One Piece - Unlimited World Red
- Onimusha Soul
- Operation Creature Feature
- Operation Flashpoint - Dragon Rising
- Operation Flashpoint - Dragon Rising
- Operation Flashpoint - Red River
- Operation Flashpoint 2 - Dragon Rising
- Orange Box
- Orc Attack - Flatulent Rebellion
- Orcs Must Die!
- Order Up!!
- Outland
- Outlast
- OutRun Online Arcade
- Outsider
- Overlord
- Overlord - Raising Hell
- Overlord 2