| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | O Xephteris Taxideuei stin Ellada
Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original |  | |  |
 | Oddworld: Abe's Exoddus (Install Disc) | PC | 2.0 | Original |  | | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Oddworld: Abe's Exoddus (Play Disc) | PC | 2.0 | Original | | | |
 | Oddworld: Abe's Exoddus (CD Installieren) | PC | 2.0 | Original |  | | |
| Oddworld: Abe's Exoddus (CD Abspielen) | PC | 2.0 | Original | | | |
| Offroad
Off-Road Redneck Racing | PC | | Original |    | ECD 000592K | |
 | Olivers Äventyr: Drakens Förbannelse | PC | | Original |     | 021120110 | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDEU00 | |
| The Operational Art of War II: 1956-2000
The Operational Art of War II: Bewaffnete Konflikten | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original | | FXX08903223D1 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original, Gold Edition | | MOPFCDEU00 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | | |
 | Operation Flashpoint: Cold War Crisis | PC | | The Games Collection | | | |
