| 20.06.2005 | O.R.B.: Off-World Resource Base |  |
| 20.06.2005 | Obi-Wan |  |
| 30.10.2005 | Obscura: The Shadow Blade | |
| 20.06.2005 | Obscure - Learn about Fear (Mortifilia - Veil of Darkness) | |
| 25.09.2009 | Obscure 2 | |
| 25.09.2008 | Ocean Commander | |
| 14.11.2008 | Ocean Range 2 | |
| 20.02.2008 | Octomania | |
| 28.06.2006 | Odama | |
| 24.05.2006 | Oddworld Stranger's Wrath |  |
| 20.06.2005 | Oddworld: Abe's Exoddus | |
| 20.06.2005 | Oddworld: Abe's Oddysee | |
| 11.10.2007 | Odin Sphere | |
| 20.06.2005 | Odyssey: The Search for Ulysses (Одиссея) | |
| 20.05.2006 | Odyssey: Winds of Athena, The | |
| 20.06.2005 | Off-Road Redneck Racing | |
| 20.06.2005 | Offensive | |
| 25.06.2007 | Office, The | |
| 24.05.2009 | Officers | |
| 20.06.2005 | Official Formula 1 Racing | |
| 20.06.2005 | Offroad | |
| 27.09.2008 | Offshore Tycoon | |
| 20.06.2005 | Oh, No! More Lemmings | |
| 29.02.2008 | Oil Tycoon | |
| 23.10.2005 | Oil Tycoon 2 | |
