Region | Title | System | Version | Edition | Languages | Serial | Status |
 | Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | |  |
 | Obscure (Disc 1) 惊悚空间 | PC | 1.0 | Original | | |  |
 | Olivers Äventyr: Drakens Förbannelse | PC | | Original | | 021120110 |  |
 | One Must Fall: Battlegrounds | PC | 2090 | Original | | |  |
 | One Must Fall: Battlegrounds | PC | 2090 | Original | | |  |
 | Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | |  |
 | Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | |  |
 | The Operational Art of War: Century of Warfare | PC | | Original | | |  |
 | Outcast (Disc 2) | PC | | Original | | 42831-9110TC |  |
 | Outlive | PC | 1.01 | Original | | |  |
 | Offroad Off-Road Redneck Racing | PC | | Original | | ECD 000592K |  |
 | Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDEU00 |  |
 | OutRun 2006: Coast 2 Coast (Disc 1) | PC | | Original | | |  |
 | The Operative: No One Lives Forever (Disc 1) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ1, FXX08903223D1 |  |
 | Oddworld: Abe's Exoddus (CD Installieren) | PC | 2.0 | Original | | |  |
 | Oddworld: Abe's Exoddus (CD Abspielen) | PC | 2.0 | Original | | |  |
 | The Operational Art of War II: 1956-2000 The Operational Art of War II: Bewaffnete Konflikten | PC | | Original | | |  |
 | O Xephteris Taxideuei stin Ellada Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original | | |  |
 | Ore no Shita de Agake 俺の下であがけ | PC | System3.9 Ver.5.43 | Original | | ALB-005 |  |