| 06/20/05 | O.R.B.: Off-World Resource Base |  |
| 06/20/05 | Obi-Wan |  |
| 10/30/05 | Obscura: The Shadow Blade | |
| 06/20/05 | Obscure - Learn about Fear (Mortifilia - Veil of Darkness) | |
| 09/25/09 | Obscure 2 | |
| 09/25/08 | Ocean Commander | |
| 11/14/08 | Ocean Range 2 | |
| 02/20/08 | Octomania | |
| 06/28/06 | Odama | |
| 05/24/06 | Oddworld Stranger's Wrath |  |
| 06/20/05 | Oddworld: Abe's Exoddus | |
| 06/20/05 | Oddworld: Abe's Oddysee | |
| 10/11/07 | Odin Sphere | |
| 06/20/05 | Odyssey: The Search for Ulysses (Одиссея) | |
| 05/20/06 | Odyssey: Winds of Athena, The | |
| 06/20/05 | Off-Road Redneck Racing | |
| 06/20/05 | Offensive | |
| 06/25/07 | Office, The | |
| 05/24/09 | Officers | |
| 06/20/05 | Official Formula 1 Racing | |
| 06/20/05 | Offroad | |
| 09/27/08 | Offshore Tycoon | |
| 06/20/05 | Oh, No! More Lemmings | |
| 02/29/08 | Oil Tycoon | |
| 10/23/05 | Oil Tycoon 2 | |
