| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | The Official Guide to Babylon 5
The Official Guide to J. Michael Straczynski's Babylon 5 | PC | | Original |  | | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
 | Oil Tycoon | PC | 1.01 | Original | | | |
 | Omar Sharif Bridge | PC | 1.0 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 1) | PC | 1.2.3.2 | Original |  | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 2) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 3) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 4) | PC | 1.2.3.2 | Original | | | |
| Omikron: The Nomad Soul (Disc 1) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 2) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 3) | PC | 1.0 | Original | | | |
| Ominous Horizons
Ominous Horizons: A Paladin's Calling | PC | 1.0 | Original | | | |
| One Unit Whole Blood | PC | 1.21 | Original | | 04-16459CD1 | |
 | Oni
奥妮 | PC | 1.7 | Original |  | | |
 | Oni | PC | 1.0 | Original |  | | |
| Oni | PC | 1.0 | Original | | | |
| Onimusha 3 | PC | | Original |   | 5004561 | |
| Open Season (Disc 1) | PC | 1.00 | Original |  | 5004904-CD 1 | |
 | Open Season (Disc 2) | PC | 1.00 | Original | | 5004904-CD 2 | |
| Open Season (Disc 3) | PC | 1.00 | Original | | 5004904-CD 3 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDUS00 | |
| Operation Flashpoint: Dragon Rising | PC | | Original | | MOFP2CDEU00 | |
 | Operation Flashpoint: Dragon Rising | PC | 1.0 | Original | | MOFP2CDEU00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original | | MOFUCDUS00 | |
 | Operation Flashpoint: Holodnaja vojna
Операция Flashpoint: Холодная война | PC | 1.46 | Original |  | | |
| Operation Flashpoint: Red River | PC | 1.0 | Original | | MOFP3CDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDUS00 | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original |  | FXX08903223D1 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.0 | Original | | FXX08903223D2 | |
 | The Operative: No One Lives Forever (Disc 1)
ノーワンリブスフォーエバー | PC | 1.004, 1.004J | Original |  | | |
| The Operative: No One Lives Forever (Disc 2)
ノーワンリブスフォーエバー | PC | 1.004, 1.004J | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original | | | |
| The Operative: No One Lives Forever (Disc 2)
In the Lounge with No One Lives Forever | PC | 1.0 | Original | | | |
| The Orange Box (Disc 1) | PC | | Original |    | VAX07705811D | |
 | The Orange Box (Disc 1) | PC | | Original | | VAI07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAI07705811D2 | |
| The Orange Box (Disc 2) | PC | | Original | | 985217 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.0 | Original | | OTA744AE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | | Original | | OTA744AE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | | Original | | OTA744AE-CD3 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Original | | 380859-CD | |
| Oregon Trail II | PC | 1.0 | Original | | | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| Orgaslave (Side-1)
オルガスレイブ | PC | | Original | | H PT 003-1 | |
| Orgaslave (Side-2)
オルガスレイブ | PC | | Original | | H PT 003-2 | |
| Oscar | PC | | Original | | | |
 | Othello | PC | | Original | | | |
| Otorva v shkole
Оторва в школе | PC | | Original | | | |
| Oudou Yuusha
王道勇者 | PC | | Original | | ALS-0029 | |
| Outcast (Disc 1) | PC | | Original | | OUTCAPC52G/A1 | |
| Outcast (Disc 2) | PC | | Original | | OUTCAPC52G/A2 | |
| Outcast (Disc 1) | PC | | Original | | 42831-9110TC | |
| Outlaws (Disc 1) | PC | 1.0 | Original | | 9511830 | |
| Outlaws (Disc 2) | PC | 1.0 | Original | | 9511831 | |
 | Outlaws (Disc 1) | PC | | Original | | | |
| Outlaws (Disc 2) | PC | | Original | | | |
| Outlaws (Disc 1) | PC | 1.0 | Original | | | |
| Outlaws (Disc 2) | PC | 1.0 | Original | | | |
 | Outlaws (Disc 1)
アウトロー | PC | 1.0 Build 3 | Original | | 9511830 | |
| Outlaws (Disc 2)
アウトロー | PC | 1.0 Build 3 | Original | | 9511831 | |
| Outlive | PC | 1.01 | Original | | | |
| Outpost | PC | | Original | | S725430 | |
| Outpost 2: Divided Destiny | PC | 1.2.0.5 | Original | | | |
| Outpost 2: Geteilte Bestimmung | PC | 1.0 | Original | | S0011248 | |
| OutRun 2006: Coast 2 Coast | PC | 1.0 | Original | | SEGA-PC029 | |
| OutRun 2006: Coast 2 Coast (Disc 1) | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast (Disc 2) | PC | | Original | | | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0298 Part No. X03-63527 | |
| Outwars (Disc 2) | PC | 1.0 | Original | | 0298 Part No. X03-57509 | |
 | Over 10 Tetrix Games | PC | | Original | | | |
| Overboard! | PC | | Original | | | |
| Overlord | PC | | Original | | MOVL1CDEU00 | |
| Overlord | PC | 1.2 | Original | | | |
| P-Slider | PC | 6.20.1.0 | Original |     | dex007 | |
| P.K.'s Place 1: Party on the Patio! | PC | 2.0 | Original | | | |
| P.K.'s Place 4: Daphne and the Seventh Wonder | PC | 2.0 | Original | | | |
| Pac-Man All-Stars | PC | 1.0 | Original | | Part # 23529CD | |
| Pac-Man no Desktop Daisakusen
パックマンのデスクトップ大作戦 | PC | | Original | | NMC2013 | |
| Pac-Man World 2 | PC | | Original | | | |
| Pac-Man World 3 | PC | 1.0 | Original | | NOX07705021D/ENG | |
| PacaPlus
パカプラス | PC | 1.0.0.9 | Original | | | |
| PacaPlusMinus
パカプラスｍｉｎｕｓ | PC | 1.00 | Original | | | |
| Pachinko da yo Daiku no Gen-san
パチンコ実機攻略シリーズ ＣＲ大工の源さん | PC | 1.00 | Original | | PDG-019-2 | |
| Pacific Fighters (Disc 1) | PC | 3.0 | Original | | 682073-CD1 | |
| Pacific Fighters (Disc 2) | PC | 3.0 | Original | | 682073-CD2 | |
| Pack 5 Racing Games (Disc 1) | PC | | Original | | | |
| Pack 5 Racing Games (Disc 2) | PC | | Original | | | |
| Painkiller: Battle out of Hell (Disc 1) | PC | | Original | | PKXPMULTICD1 | |
| Painkiller: Battle out of Hell (Disc 2) | PC | | Original | | PKXPMULTICD2 | |
| Painkiller: Battle out of Hell (Disc 1) | PC | | Original | | PCO427CD | |
| Painkiller: Battle out of Hell (Disc 2) | PC | | Original | | PCO427CD | |
| Painkiller: Black Edition | PC | 1.6 | Original | | | |
| Painkiller: Complete Collection (Disc 1)
Painkiller Collection | PC | | Original | | | |
| Painkiller: Complete Collection (Disc 2)
Painkiller Collection | PC | | Original | | | |
| Painkiller: Heaven's Got a Hitman (Disc 3) | PC | | Original | | PCO391CD, PCO391CD3 | |
 | Painkiller: Heaven's Got a Hitman (Disc 1) | PC | 1.0 | Original | | PCO391CD, PNKRCD1ASIA, PNKRCD1EN | |
| Painkiller: Heaven's Got a Hitman (Disc 2) | PC | 1.0 | Original | | PCO391CD, PCO391CD2, PNKRCD2ASIA, PNKRCD2EN | |
| Painkiller: Heaven's Got a Hitman (Disc 3) | PC | 1.0 | Original | | PCO391CD, PNKRCD3ASIA, PNKRCD3EN | |
