Region | Title | System | Version | Edition | Languages | Serial | Status |
| Official U.S. PlayStation Magazine Demo Disc 74 | PS2 | 1.00 | | | SCUS 97249 | |
| 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 | |
| Official U.S. PlayStation Magazine Demo Disc 96 | PS2 | 1.00 | | | SCUS 97448 | |
| Overlord II | XBOX360 | | Original | | CM-2057 | |
| The Operative: No One Lives Forever | PS2 | 1.00 | Original | | SLES-50592 | |
| Official PlayStation 2 Magazine Demo 82 | PS2 | 1.00 | | | SCED-54407 | |
| Official PlayStation 2 Magazine Demo 56 | PS2 | 1.01 | | | SCED-53122 | |
| Official PlayStation 2 Magazine Demo 54 | PS2 | 1.01 | | | SCED-52169 | |
| Official PlayStation 2 Magazine Demo 52 | PS2 | 1.01 | | | SCED-52167 | |
| Official PlayStation 2 Magazine Demo 51 | PS2 | 1.00 | | | SCED-52166 | |
| Official PlayStation 2 Magazine Demo 55 | PS2 | 1.01 | | | SCED-52170 | |
| Official PlayStation 2 Magazine Demo 48 | PS2 | 1.01 | | | SCED-52163 | |
| Official PlayStation 2 Magazine Demo 50 | PS2 | 1.03 | | | SCED-52165 | |
| Official PlayStation 2 Magazine Demo 49 | PS2 | 1.03 | | | SCED-52164 | |
| Official PlayStation 2 Magazine Demo 43 | PS2 | 1.00 | | | SCED-52051 | |
| Official PlayStation 2 Magazine Demo 41 ops2m 41 | PS2 | 1.01 | | | SCED-51536 … | |
| Official PlayStation 2 Magazine Demo 40 | PS2 | 1.02 | | | SCED-51535 … | |
| Official PlayStation 2 Magazine Demo 38 | PS2 | 1.00 | | | SCED-51538 | |
| Official PlayStation 2 Magazine Demo 36 | PS2 | 1.00 | | | SCED-51534 | |
| Official PlayStation 2 Magazine Demo 35 | PS2 | 1.00 | | | SCED-51533 | |
| Official PlayStation 2 Magazine Demo 34 | PS2 | 1.01 | | | SCED-51532 | |
| Official PlayStation 2 Magazine Demo 33 | PS2 | 1.01 | | | SCED-51531 | |
| Official PlayStation 2 Magazine Demo 30 | PS2 | 1.01 | | | SCED-51457 | |
| Official PlayStation 2 Magazine Demo 29 | PS2 | 1.01 | | | SCED-51384 … | |
| Official PlayStation 2 Magazine Demo 28 | PS2 | 1.00 | | | SCED-50750 | |
| Official PlayStation 2 Magazine Demo 27 | PS2 | 1.01 | | | SCED-50749 … | |
| Official PlayStation 2 Magazine Demo 26 | PS2 | 1.02 | | | SCED-50748 … | |
| Official PlayStation 2 Magazine Demo 25 | PS2 | 1.00 | | | SCED-50747 … | |
| Official PlayStation 2 Magazine Demo 24 | PS2 | 1.10 | | | SCED-50746 | |
| Official PlayStation 2 Magazine Demo 23 | PS2 | 1.00 | | | SCED-50745 | |
| Official PlayStation 2 Magazine Demo 21 | PS2 | 1.00 | | | SCED-50742 … | |
| Official PlayStation 2 Magazine Demo 20 | PS2 | 1.10 | | | SCED-50743 | |
| Official PlayStation 2 Magazine Demo 19 | PS2 | 1.00 | | | SCED-50154 | |
| Official PlayStation 2 Magazine Demo 18 | PS2 | 1.00 | | | SCED-50153 … | |
| Official PlayStation 2 Magazine Demo 17 | PS2 | 1.00 | | | SCED-50152 … | |
| Official PlayStation 2 Magazine Demo 15 | PS2 | 1.00 | | | SCED-50150 | |
| Official PlayStation 2 Magazine Demo 14 | PS2 | 1.00 | | | SCED-50149 | |
| Official PlayStation 2 Magazine Demo 13 | PS2 | 1.00 | | | SCED-50148 | |
| Official PlayStation 2 Magazine Demo 12 | PS2 | 1.00 | | | SCED-50147 | |
| Official PlayStation 2 Magazine Demo 11 | PS2 | 1.10 | | | SCED-50146 | |
| Official PlayStation 2 Magazine Demo 10 | PS2 | 1.10 | | | SCED-50145 | |
| Official PlayStation 2 Magazine Demo 9 | PS2 | 1.00 | | | SCED-50144 | |
| Official PlayStation 2 Magazine Demo 8 | PS2 | 1.00 | | | SCED-50143 | |
| Official PlayStation 2 Magazine Demo 7 | PS2 | 1.00 | | | SCED-50142 | |
| Official PlayStation 2 Magazine Demo 6 | PS2 | 1.00 | | | SCED-50141 | |
| The Orange Box 오렌지 박스 | XBOX360 | | Original | | EA-2063 | |
| Onimusha: Blade Warriors | PS2 | 1.01 | Original | | SLES-51913 | |
| Otomedius Gorgeous! オトメディウス ゴージャス! | XBOX360 | | Original | | KN-2030 | |
| OutRun 2 SP アウトラン2 スペシャルツアーズ | PS2 | 1.03 | Shokai Genteiban | | SLPM 66628 | |
| Official PlayStation 2 Magazine-UK Greatest Hits Volume 8: Special Edition: Racing Games playstation 2 greatest hits volume 8 | PS2 | 1.10 | | | SCED-50786 | |
| Official PlayStation 2 Magazine Demo 70 | PS2 | 1.01 | | | SCED-54024 … | |
| ObsCure II | PC | 1.0.0.0 | Original | | | |
| OutRun 2006: Coast 2 Coast | PSP | 1.01 | Original, Platinum: The Best of PSP | | ULES-00262 | |
| Ōkami | WII | | Original | | RVL-ROWE-USA | |
| Onimusha 3 鬼武者3 | PS2 | 1.01 | Original | | SLPM 65413 | |
| Onimusha 2 鬼武者2 | PS2 | 1.04 | Original, Mega Hits! | | SLPM 65101 … | |
| Onimusha 鬼武者 | PS2 | 1.03 | Original, Mega Hits! | | SLPM 65010 … | |
| Opoona | WII | | Original | | RVL-RPOP-EUR | |
| Onimusha 2: Samurai's Destiny | PS2 | 1.00 | Original | | SLES-50978 | |
| The Orange Box (Disc 1) | PC | | Original, EA Classics | | 985207, VAE07705811D, VAE07705811D/ENG, VAE07707118D/ENG, VAX07705811D/AUS | |
| The Orange Box (Disc 2) | PC | | Original | | 985217 | |
| Oracle no Houseki: Jewels of the Oracle オラクルの宝石 Jewels of the Oracle | PSX | | Original | | SLPS 00240 | |
| Oni | PS2 | 1.02 | Original | | SLES-50176 | |
| OutRun 2006: Coast 2 Coast | PC | 1.0 | Original | | SEGA-PC029 | |
| Outlaw Tennis | PS2 | 1.01 | Original | | SLES-53490 | |
| Official PlayStation 2 Magazine Sonderausgabe 2004/3 | PS2 | 1.00 | | | SCED-52997 | |
| Odama 大玉 | GC | Rev 1 | Bundled with Microphone | | DL-DOL-GOOJ-JPN | |
| One Piece: Grand Battle! Rush ワンピース グラバト! ラッシュ | GC | | Original | | DL-DOL-GOPJ-JPN | |
| Open Season | GC | | Original | | DL-DOL-GOSE-USA | |
| Oz no Mahoutsukai: Another World: Rung Rung オズの魔法使い ~Another World~ ルングルング | PSX | | Original | | SLPS 02335 | |
| Official Xbox Magazine Game Disc 77 | XBOX360 | | | | IM-2055 | |
| Onimusha: Dawn of Dreams (Disc 2) | PS2 | 1.00 | Original | | SLES-82039 | |
| Onimusha: Dawn of Dreams (Disc 1) | PS2 | 1.00 | Original | | SLES-82038 | |
| Onechanbara: Bikini Zombie Slayers | WII | | Original | | RVL-RONE-USA | |
| Overlord: Dark Legend | WII | | Original | | RVL-ROAE-USA | |
| Official PlayStation 2 Magazine Demo 71 | PS2 | 1.00 | | | SCED-54099 | |
| Onside Complete Soccer | PSX | Rev 1 | Original | | SLES-00079 | |
| Official PlayStation 2 Magazine Demo 72 | PS2 | 1.00 | | | SCED-54044 | |
| Official PlayStation 2 Magazine Demo 73 | PS2 | 1.01 | | | SCED-54045 | |
| O.D.T. | PSX | | Original | | SLES-01391 | |
| Odama | GC | Rev 1 | Original | | DL-DOL-GOOE-USA | |
| Odama | GC | | Original | | DL-DOL-GOOP-EUR | |
| OutRun 2006: Coast 2 Coast | XBOX | | Original | | SE-136 | |
| OutRun 2 | XBOX | | Original | | SE-054 | |
| Ōkami | PS2 | 1.01 | Original, Greatest Hits | | SLUS 21115 … | |
| Official U.S. PlayStation Magazine Demo Disc 101 | PS2 | 1.00 | | | SCUS 97453 | |
| Official U.S. PlayStation Magazine Demo Disc 89 | PS2 | 1.00 | | | SCUS 97342 | |
| Official U.S. PlayStation Magazine Demo Disc 68 | PS2 | 1.00 | | | SCUS 97243 | |
| Official U.S. PlayStation Magazine Demo Disc 67 | PS2 | 1.00 | | | SCUS 97242 | |
| Official U.S. PlayStation Magazine Demo Disc 87 | PS2 | 1.01 | Demo | | SCUS 97340 | |
| Ōkami | WII | | Original | | RVL-ROWP-EUR | |
| Outlaw Golf | GC | | Original | | DL-DOL-GOFE-USA | |
| Official PlayStation 2 Magazine Demo 50 | PS2 | 1.01 | | | SCED-52796 | |
| One Piece: Grand Battle! 3 ONE PIECE ~グランド・バトル!3~ | GC | | Original | | DL-DOL-GOGJ-JPN | |
| Official PlayStation 2 Magazine Demo 100 | PS2 | 1.00 | | | SCED-55119 | |
| Official PlayStation 2 Magazine Demo 99 | PS2 | 1.00 | | | SCED-55118 | |
| Official PlayStation 2 Magazine Demo 98 | PS2 | 2.01 | | | SCED-55117 … | |
| Outlaw Golf 2 | PS2 | 1.01 | Original | | SLES-52965 | |
| Official PlayStation 2 Magazine Demo 42 | PS2 | 1.04 | | | SCED-51539 … | |
| Official PlayStation 2 Magazine Demo 39 | PS2 | 1.02 | | | SCED-51540 … | |
| Official PlayStation 2 Magazine Demo 60 | PS2 | 1.00 | | | SCED-53163 | |
| Official PlayStation 2 Magazine Demo 47 ops2m demo 47 | PS2 | 1.01 | | | SCED-52162 … | |
| Official PlayStation 2 Magazine Demo 37 | PS2 | 1.00 | | | SCED-51537 | |
| Odin Sphere | PS2 | 1.00 | Original | | SLES-55110 | |
| ObsCure | PS2 | 1.00 | Original | | SLES-52737 | |
| Onimusha 3 | PS2 | 1.01 | Original | | SLES-51914 … | |
| OutRun 2006: Coast 2 Coast | PS2 | 1.01 | Original | | SLUS 21274 | |
| Open Season | PS2 | 1.00 | Original | | SLES-54310 | |
| Onimusha: Dawn of Dreams (Disc 2) | PS2 | 1.02 | Original | | SLUS-21362 | |
| Onimusha: Dawn of Dreams (Disc 1) | PS2 | 1.02 | Original | | SLUS-21180 | |
| Onimusha: Warlords | PS2 | 1.00 | Original, Greatest Hits | | SLUS-20018 … | |
| Onimusha: Blade Warriors | PS2 | 1.01 | Original | | SLUS-20710 | |
| Onimusha 3: Demon Siege | PS2 | 1.01 | Original | | SLUS-20694 | |
| Official PlayStation 2 Magazine Demo 48 | PS2 | 1.01 | | | SCED-52619 … | |
| Ōkami | PS2 | 1.00 | Original | | SLES-54439 … | |
| Option: Tuning Car Battle オプション チューニングカーバトル | PSX | Rev 1 | PlayStation the Best | | SLPS 91037 | |
| Official PlayStation 2 Magazine Demo 92 | PS2 | 1.00 | | | SCED-54417 | |
| Over Drivin' IV オーバードライビンⅣ | PSX | | Original | | SLPS 02099 | |
| Osada Avalona (Disc 1) Осада Авалона | PC | | | | | |
| Osada Avalona (Disc 2) Осада Авалона | PC | | | | | |
| Over Drivin' II オーバードライビンⅡ | PSX | | Original | | SLPS 00895 | |
| Over Drivin' III: Hot Pursuit オーバードライビンⅢ | PSX | | Original | | SLPS 01593 | |
| Official PlayStation 2 Magazine Demo 81 | PS2 | 1.00 | | | SCED-54406 … | |
| Oni | PS2 | 1.02 | Original, Platinum | | SLES-50134 … | |
| OPSM Best Racing Game Ever | PSX | | | | SCED-02492 | |
| Open Season | PSP | 1.01 | Original | | ULES-00507 | |
| Online Start-Up Disc 4.0 | PS2 | 1.00 | | | SCUS-97357 | |
| Onimusha: Warlords | PS2 | 1.02 | Original, Platinum | | SLES-50247 | |
| Onimusha 2: Samurai's Destiny | PS2 | 1.03 | Original | | SLUS-20393 | |
| Official PlayStation 2 Magazine Demo 83 | PS2 | 1.00 | | | SCED-54408 … | |
| Official PlayStation 2 Magazine Demo 80 | PS2 | 1.00 | | | SCED-54405 | |
| Official PlayStation 2 Magazine Demo 79 | PS2 | 1.00 | | | SCED-54404 | |
| Official PlayStation 2 Magazine Demo 77 | PS2 | 1.01 | | | SCED-54049 | |
| Official PlayStation 2 Magazine Demo 76 | PS2 | 1.01 | | | SCED-54048 | |
| Official PlayStation 2 Magazine Demo 71 | PS2 | 1.02 | | | SCED-54043 | |
| Official PlayStation 2 Magazine Demo 69 | PS2 | 1.01 | | | SCED-53978 | |
| Official PlayStation 2 Magazine Demo 66 | PS2 | 1.00 | | | SCED-53169 | |
| Official PlayStation 2 Magazine Demo 65 | PS2 | 1.01 | | | SCED-53168 | |
| Official PlayStation 2 Magazine Demo 64 | PS2 | 1.00 | | | SCED-53167 | |
| Official PlayStation 2 Magazine Demo 62 | PS2 | 1.00 | | | SCED-53165 | |
| Official PlayStation 2 Magazine Demo 46 | PS2 | 1.01 | | | SCED-52161 … | |
| Official PlayStation 2 Magazine Demo 45 | PS2 | 1.02 | | | SCED-52160 | |
| Official PlayStation 2 Magazine Demo 44 | PS2 | 1.01 | | | SCED-52052 … | |
| Official PlayStation 2 Magazine Demo 32 | PS2 | 1.00 | | | SCED-51530 | |
| Official PlayStation 2 Magazine Demo 31 | PS2 | 1.02 | | | SCED-51529 | |
| Official PlayStation 2 Magazine Demo 22 | PS2 | 1.00 | | | SCED-50744 … | |
| Official PlayStation 2 Magazine Demo 16 | PS2 | 1.00 | | | SCED-50151 | |
| Odin Sphere | PS2 | 1.00 | Original, Greatest Hits | | SLUS 21577 … | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLES-00841 | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLES-11505 | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLES-01505 | |