Region | Title | System | Version | Edition | Languages | Serial | Status |
| Oretachi Geesen Zoku: Time Pilot オレたちゲーセン族 タイムパイロット | PS2 | 1.01 | Original | | SLPM 62644 | |
| Oni 奥妮 | PC | 1.7 | Original | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Oceans Below | PC | | Bundle Version OEM | | RVL 13-004-059 Rev. A / 2198610-590002 / I 083100 | |
| Official Xbox Magazine Game Disc 17 | XBOX | | Original | | IM-017 | |
| Official Xbox Magazine Game Disc 24 | XBOX | | Original | | IM-024 | |
| Of Orcs and Men | XBOX360 | | Original | | FE-2009 | |
| Omerta: City of Gangsters | XBOX360 | | Original | | KY-2021 | |
| Operation Europe: Path to Victory 1939-45 | PC | | Original | | | |
| Off Limits: Cassiopeia | PC | | ROMWARE | | ROM 10100 | |
| The Oni Taiji!!: Mezase! Nidaime Momotarou The鬼退治!! 目指せ!二代目桃太郎 | PSX | | Major Wave | | SLPM 86989 | |
| Official Xbox Magazine Game Disc 11 | XBOX | | Original | | IM-013 | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 112 | XBOX360 | | | | IM-2159 | |
| The Omega Stone: Secrets of the Ancients (Disc 4) | PC | | Original | | OMSTENCD4 | |
| The Omega Stone: Secrets of the Ancients (Disc 1) | PC | | Original | | OMSTENCD1 | |
| The Omega Stone: Secrets of the Ancients (Disc 3) | PC | | Original | | OMSTENCD3 | |
| The Omega Stone: Secrets of the Ancients (Disc 2) | PC | | Original | | OMSTENCD2 | |
| Outcast (Disc 1) | PC | | Covermount | | | |
| Outcast (Disc 2) | PC | | Covermount | | | |
| Official PlayStation 2 Magazine Demo 14 | PS2 | 1.00 | | | SCED-50610 … | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 100 | XBOX360 | | | | IM-2146 | |
| Obrońca | PC | | FajnaGra.pl | | | |
| Overwatch | PC | | Origins Edition | | 052429 | |
| One Must Fall 2097 | PC | 1.1 | Demo | | | |
| One Piece: Pirate Warriors + One Piece: Pirate Warriors 2 | PS3 | 01.00 | Original | | BLES-02131 | |
| Outlaw Racers | PC | | Sold Out Software | | | |
| Ooedo Senryoubako 大江戸千両箱 | PSP | 1.01 | Original | | ULJM 05099 | |
| OutRun 2 | XBOX | | Demo | | SE-057 | |
| Otorva v shkole Оторва в школе | PC | | Original | | | |
| One Must Fall 2097 | PC | | Demo: JukeBox Collection | | | |
| Open Kart | PC | | I Videogiochi del "Giornalino" | | | |
| Otogi 오토기 | XBOX | | Original | | YB-002 | |
| Official PlayStation 2 Magazine Germany Winter 2006 ops2 ger winter 2006 | PS2 | 1.00 | | | SCED-54558 | |
| Out of This World | 3DO | RE | 3DO Maniac Pack | | | |
| OutRun 2006: Coast 2 Coast (Disc 1) | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast (Disc 2) | PC | | Original | | | |
| Official PlayStation Magazine Issue 82: April 2013 | PS3 | 01.00 | | | BCED-01817 | |
| Official PlayStation Magazine Issue 79: January 2013 | PS3 | 01.03 | | | BCED-01574 | |
| Only You: Seikimatsu no Juliet-tachi Only You ~世紀末のジュリエットたち~ | FMT | | Shokai Gentei | | | |
| Onimusha 2: Samurai's Destiny 鬼武者2 PAL | PS2 | 1.00 | Beta | | SLES-50978 | |
| Onimusha: Put' samuraja Onimusha: Путь самурая | PC | | Original | | | |
| Overlord | PC | 1.2 | Original | | | |
| Op Jacht naar Vernuft | CDI | | | | | |
| Oshiete! Popotan おしえて! ぽぽたん | PS2 | 1.02 | Original | | SLPM 65535 | |
| Ojousama Express お嬢様特急 | PSX | | Taikenban | | SLPM 80255 | |
| Origami | CDI | | Original | | 810 0041 | |
| Orange Pocket: Root オレンジポケット ~リュート~ | PS2 | 1.02 | Original | | SLPM 65525 | |
| O Xephteris Taxideuei stin Ellada Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original | | | |
| Oretachi Geesen Zoku: Nekketsu Koukou Dodgeball-bu オレたちゲーセン族 熱血高校ドッジボール部 | PS2 | 1.00 | Original | | SLPM 62705 | |
| Les Ours Berenstain: Comme des Grands | CDI | 1.05 | | | 812 0063 | |
| Otousan no Tame no Hanafuda Tenkomori お父さんのための花札 てんこもり | PC | | Original | | THT-063 | |
| Oto to E no Deru Eigo Jisho No. 2: English in Dream 音と絵の出る英語辞書 No.2 「English in Dream」 | FMT | | Original | | HMB-129 | |
| Oto to E no Deru Eigo Jisho No. 3: Nandemo Illust Eigo Jiten 音と絵の出る英語辞書 No.3 「なんでもいらすとえいごじてん」 | FMT | | Original | | HMB-131 | |
| Oto to E no Deru Eigo Jisho No. 4: Nandemo Illust Eigo Jiten Part 2 音と絵の出る英語辞書 No.4 「なんでもいらすとえいごじてん Part 2」 | FMT | | Original | | HMB-170 | |
| Otomedius Excellent! オトメディウスX(エクセレント!) | XBOX360 | | Original | | KN-2074 | |
| Ollie King オーリーキング | CHIHIRO | 1.003 | Original | | GDX-0007 | |
| Official Xbox Magazine Game Disc 10 | XBOX | | Original | | IM-010 | |
| Ogura Hyakunin Isshu 小倉百人一首 | 3DO | | Original | | SV-0201 | |
| Official Xbox Magazine Game Disc 19 | XBOX | | Original | | IM-019 | |
| Official Xbox Magazine Game Disc 51 | XBOX | | Original | | IM-205 | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 111 | XBOX360 | | | | IM-2157 | |
| Over G: Energy Airforce | XBOX360 | | Original | | TI-2001 | |
| Oretachi Geesen Zoku: Yie Ar Kung Fu オレたちゲーセン族 イー・アル・カンフー | PS2 | 1.01 | Original | | SLPM 62696 | |
| Official Xbox Magazine Game Disc 89 | XBOX360 | | | | IM-2081 | |
| Odysseia ΟΔΥΣΣΕΙΑ | PC | 1.8 | Original | | | |
| Onii-chan Jushin-chuu お兄ちゃん受信中 | PC | | Original | | | |
| Offensive Offensive War: The Ultimate Strategical Combat Game | PC | | Covermount | | | |
| Official PlayStation 2 Magazine Demo 40 | PS2 | 1.01 | | | SCED-52054 | |
| Official PlayStation 2 Magazine Demo 42 | PS2 | 1.02 | | | SCED-52270 | |
| OverTop オーバートップ | NGCD | | Original | | ADCD-011 | |
| Oshiete Noobow おしえて ぬ~ぼ~ | FMT | | Original | | HMF-110 | |
| Oscar | PC | | Jackson Libri | | | |
| Oil Tycoon | PC | 1.01 | Original | | | |
| The Outfit | XBOX360 | | Original | | TQ-2002 | |
| Das Offizielle Xbox-Magazin: Cover-DVD 12/2002 | XBOX | | Original | | IM-003 | |
| Official PlayStation 2 Magazine Demo 67 ops2m demo 67 | PS2 | 1.00 | | | SCED-53932 | |
| Official PlayStation 2 Magazine Demo 81 ops2m demo 81 spa/por | PS2 | 1.00 | | | SCED-54603 | |
| Official PlayStation 2 Magazine Demo 69 & 70 ops2m demo 69 & 70 | PS2 | 1.01 | | | SCED-54036 | |
| Oni | PC | 1.0 | Covermount | | | |
| Ouro e Glória: O Caminho para El Dorado | PC | | Original | | 906.02.0 | |
| 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 | | | |
| Obsidian: Alla Frontiera della Logica (Disc 1) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 2) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 3) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 4) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 5) | PC | 1.0.001 | Original | | | |
| Ocean/Infogrames Show Case December 1997 | PC | | | | | |
| Ore no Shikabane o Koete Yuke 俺の屍を越えてゆけ | PSP | 1.01 | Original, Fukkatsu Kinen Genteiban | | UCJS 10116 … | |
| Ore no Imouto ga Konna ni Kawaii Wake ga Nai Portable ga Tsuzuku Wake ga Nai (Disc 1) 俺の妹がこんなに可愛いわけがない ポータブル が続くわけがない | PSP | 1.00 | Original, PSP the Best, Tokusou-ban | | ULJS 00490 … | |
| Ore no Imouto ga Konna ni Kawaii Wake ga Nai Portable ga Tsuzuku Wake ga Nai (Disc 2) 俺の妹がこんなに可愛いわけがない ポータブル が続くわけがない | PSP | 1.00 | Original, PSP the Best, Tokusou-ban | | ULJS 00491 … | |
| Oldtimer | PHOTO-CD | | Original | | 813 0067 | |
| Ougon Musou Kyoku X 黄金夢想曲X | XBOX360 | | Original | | AJ-2003 | |
| Oookuki 大奥記 | PS2 | 1.02 | Original | | SLPM 66441 | |
| Otona no Gal-jong: Kimi ni Haneman! おとなのギャル雀 ~きみにハネ満!~ | PS2 | 1.03 | Jaleco the Best | | SLPM 62549 | |
| The Original Mulan 花木兰 | PC | | Original | | | |
| Obaachan no Chiebukuro おばあちゃんの知恵袋 | FMT | | Original | | HMC-169 | |
| Oshidashi Zintrick ~ ZinTricK 押し出しジントリック | NGCD | | Original | | ADCD-104 | |
| Oretachi Geesen Zoku: Scramble オレたちゲーセン族 スクランブル | PS2 | 1.01 | Original | | SLPM 62626 | |
| Overclocked: Una Storia di Violenza | PC | 1.1 | Original | | | |
| Obscure (Disc 1) 惊悚空间 | PC | 1.0 | Original | | | |
| Obscure (Disc 2) 惊悚空间 | PC | 1.0 | Original | | | |
| Obscure (Disc 3) 惊悚空间 | PC | 1.0 | Original | | | |
| Obscure (Disc 4) 惊悚空间 | PC | 1.0 | Original | | | |
| Oretachi Geesen Zoku: Burger Time オレたちゲーセン族 バーガータイム | PS2 | 1.00 | Original | | SLPM 62695 | |
| 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 | |
| Obscure (Disc 1) ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 2) ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 3) ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 4) ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 5) ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | CD-C95-166-0 | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | CD-C95-166-1 | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | CD-C95-166-2 | |
| Ohio Distinctive Software Vol. I | PC | | | | | |
| The Oregon Trail: Classic Edition | PC | 3.0.1 | SoftKey | | POT144CE-CD | |
| Overlord II | PC | | Original | | | |
| OverBlood 2: The "East Edge" File オーバーブラッド2 -The "East Edge" File- | PSX | | Premium Disc | | SLPM 80270 | |
| One Step Ahead | CDI | | | | Demo 10.05.94 | |
| Operaciya Bagration Операция Багратион | PC | | Original | | | |
| Official PlayStation Magazine Issue 78: Christmas 2012 | PS3 | 01.00 | | | BCED-01573 | |
| Odlikas za Prvake Одликаш за Прваке | PC | | Original | | | |
| One Piece: Kaizoku Musou 3 ワンピース 海賊無双3 | PS3 | 01.01 | Original | | BLJM 61261 | |
| Otome-teki Koi Kakumei: Love Revo!! 乙女的恋革命★ラブレボ!! | PS2 | 1.03 | Original, Love Revo Box | | SLPM 66238 … | |
| Odyssey (Disc 1) 奧德賽 | PC | | Original | | | |
| Odyssey (Disc 2) 奧德賽 | PC | | Original | | | |
| Outpost 2: Divided Destiny | PC | 1.0 | Original | | S0011246 | |
| Olympiad Qiaosai 2 奧林匹亞橋賽2 | PC | | Original | | | |
| Odin Sphere: Leifthrasir オーディンスフィア レイヴスラシル | PS3 | 01.00 | Original | | BLJM 61239 | |
| Oddworld: Abe's Oddysee | PSX | | Trade Demo | | | |
| Outlive | PC | 1.01 | Original | | | |
| The Oregon Trail | PC | 1.1 | Original | | #HCD606 | |
| Ore no Shikabane o Koete Yuke 俺の屍を越えてゆけ | PSX | | Tentou-you Movie Disc | | PCPX 96160 | |
| Oddworld: L'Odyssée d'Abe | PC | | Original | | IB2G-ODDF5 | |
| Outlaw Golf | PC | | Original | | RM-OUTGOLF-UK | |
| One Step Beyond | PC | | Hit Squad: Regenerator | | | |
| Oneechanbara Z: Kagura with NoNoNo! お姉チャンバラZ~カグラ~ With NoNoNo! | PS3 | 01.03 | Original | | BLJS 10221 | |
| Oni | MAC | | Original | | | |
| One Piece: Romance Dawn: Bouken no Yoake ワンピース ROMANCE DAWN 冒険の夜明け | PSP | 1.01 | Original | | ULJS 00550 … | |
| Otostaz 蓋蓋樂 | PS2 | 1.00 | Original | | SCPS 55023 | |
| Oshare Cooking おしゃれクッキング | FMT | Rev A | Original | | HMA-267A | |
| Okiraku TownsGEAR お気楽 TownsGEAR | FMT | | Bundled with Book | | SBHW-00002 | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Operation Mittelmeer | PC | | Original | | | |
| Oujisama Lv1 王子さまLv1 | PC | | Original | | | |
| Outlaws (Disc 1) | PC | | M6 Multimedia | | M6IMM6 | |
| Outlaws (Disc 2) | PC | | M6 Multimedia | | M6IMM6 | |
| Outlaws (Demonstration Program) | PC | Demo 1.0 CD Build 3 | Demo | | 644230 | |
| Option: Tuning Car Battle Option チューニングカーバトル | PSX | | Highlight-ban | | SLPM 80203 | |
| Option: Tuning Car Battle Option チューニングカーバトル | PSX | | Taikenban | | SLPM 80206 | |
| Opowieści z Narnii: Książe Kaspian | PC | | Covermount | | | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| Ozzie's World | PC | | Original | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Rerelease | | OTA744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | 1.2 | Original | | OTA744BE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.2 | Original | | OTA744BE-CD3 | |
| Overlord | PC | | Original | | MOVL1CDEU00 | |
| The Official Guide to The Daedalus Encounter: Companion Disc | PC | | Original | | | |
| Opening Night | PC | 1.0 | Original | | #HCD646A | |
| Opening Night: Behind The Scenes | PC | 1.0 | Original | | #HCD646B | |
| Oretachi Geesen Zoku: Moon Cresta オレたちゲーセン族 ムーンクレスタ | PS2 | 1.01 | Original | | SLPM 62645 | |
| Oretachi Geesen Zoku: Quarth オレたちゲーセン族 クォース | PS2 | 1.02 | Original | | SLPM 62704 | |
| Oretachi Geesen Zoku: Rabio Lepus オレたちゲーセン族 ラビオ レプス | PS2 | 1.00 | Original | | SLPM 62707 | |
| Oretachi Geesen Zoku: Contra オレたちゲーセン族 魂斗羅 | PS2 | 1.00 | Original | | SLPM 62730 | |
| Oretachi Geesen Zoku: Trio the Punch オレたちゲーセン族 トリオ・ザ・パンチ | PS2 | 1.02 | Original | | SLPM 62745 | |
| The Orange Box (Disc 1) | PC | | Original | | VAD07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAD07705811D2 | |
| Open Season (Disc 1) | PC | | Original | | 5004905-CD 1 | |
| Open Season (Disc 2) | PC | | Original | | 5004905-CD 2 | |
| Open Season (Disc 3) | PC | | Original | | 5004905-CD 3 | |
| ODS Robot Challenge | PC | | Original | | | |
| Oretachi Geesen Zoku: Crazy Climber オレたちゲーセン族 クレイジー・クライマー | PS2 | 1.01 | Original | | SLPM 62627 | |
| Operation Flashpoint: Red River | PC | | Original | | MOFP3CDUS00 | |
| Odyssey: The Legend of Nemesis | MAC | 1.0 | Original | | | |
| Oceans Below The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.01E | Enhanced Education Version | | 480599-CD | |
| Oretachi Geesen Zoku: Sonic Wings オレたちゲーセン族 ~ソニックウィングス~ | PS2 | 1.01 | Original | | SLPM 62646 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Rerelease | | OTF744CE-CD2 | |
| Off-World Interceptor 혹성질주 | 3DO | | Original | | GDT-GA241 | |
| Operation Flashpoint: Dragon Rising | PC | | Original | | MOFP2CDEU00 | |
| Okigaru Igo Taikyoku お気軽囲碁対局 | PALM | | Original | | | |
| Okashina Mother Goose: Mixed-Up Mother Goose おかしなマザー・グース | FMT | | Original | | HMB-235 | |
| Okigaru Igo Taikyoku お気軽囲碁対局 | PPC | | Original | | | |
| Optimum Resource Sampler | PC | | Original | | | |
| Ore no Yome: Anata dake no Hanayome 俺の嫁 ~あなただけの花嫁~ | XBOX360 | | Original | | IF-2008 | |
| Outward | PC | | Day One Edition | | 1024669LAINT, 103699 | |
| Das Offizielle Xbox-Magazin: Cover-DVD 06/2003 | XBOX | | Original | | IM-017 | |
| Official Xbox Magazine Game Disc 28 | XBOX | | Original | | IM-028 | |
| Oretachi Geesen Zoku: Terra Cresta オレたちゲーセン族 テラクレスタ | PS2 | 1.04 | Original | | SLPM 62661 | |
| Outlaws (Disc 1) | PC | 2.0 | Collection LucasArts | | | |
| Outlaws (Disc 2) | PC | 2.0 | Collection LucasArts | | | |
| The Orange Box | PS3 | 01.00 | Original | | BLES-00172 | |
| Odnazhdy' v Chikago Однажды в Чикаго | PC | 1.1.0.0 | Original | | | |
| Ostrov Nanda Остров Нанда | PC | 1.000 | Original | | | |
| Oil Platform Simulator | PC | 1.0 | Original | | | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
| Osterreichs Werbepreise: Vier Highlights | CDI | | Original | | | |
| Outdoor Wander Land アウトドアワンダーランド | MAC | | Original | | ILL-940715 | |
| De Overval: Over Dwangmiddelen en Getuigenverhoor | CDI | | Original | | ovrvl 01 | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 110 | XBOX360 | | | | IM-2156 | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144BE-CD | |
| Ontdek de Interactieve Wereld van Neckermann | CDI | | Original | | | |
| Operation Flashpoint: Red River | PC | | Kakaku Kaiteihan | | FBG028W000A10 | |
| OptImage CD-I Starter System: Sampler Disc: Version 1.1 | CDI | | | | | |
| Out of This World | 3DO | | Original | | | |
| Orion's Puzzle Collection | DC | 1.000 | Unlicensed | | | |
| Obut Pétanque 2 | XBOX360 | | Original | | W6-2008 | |
| Okano Software Classics: Volume 2 | PC | | Original | | | |
| Otto's Ottifanten | PC | | Original | | | |
| Objectif Transparence | CDI | | Original | | RP IND 4 94 | |
| OptImage CD-I 220 Adjustment Disc | CDI | | Original | | | |
| OptImage Media Showcase | CDI | 1.0 | Original | | | |
| Operation | PC | | General Mills | | | |
| Our Worst Fears: Die Blumen des Todes | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) (Game Disc) | MAC | 1.004 | MacPlay | | | |
| One Piece: Pirate Warriors | PS3 | 01.01 | Original | | BLES-01672 … | |
| The Orange Box | XBOX360 | | Original | | EA-2063 | |
| Operation | PC | | General Mills | | AM0703R71 | |
| Otto Bock: Orthopädische Industrie: Neuheiten Vol. 2: Stand Januar 1997 | CDI | | Original | | | |
| Open Universiteit: Practicum Toxicologische Histopathologie Open University: Practical Toxicological Histopathology | CDI | | Original | | 4589 | |
| Oil of Ulay: Colour Collection: Colour Consultant | CDI | | Original | | | |
| Oksfordzka Encyklopedia Historii Świata. Tom II | PC | | Covermount | | SELL 0108 | |
| Oz: The Magical Adventure | PC | | Original | | | |
| Das Offizielle Xbox-Magazin: Cover-DVD 08/2002 | XBOX | | Original | | IM-001 | |
| Das Offizielle PlayStation 2 Magazin 02/2004: Uncut Edition ops2m uncut edition 02/2004 | PS2 | 1.01 | | | SCED-52082 | |
| Operaciya Silent Storm: Chasovye (Disc 1) Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Operaciya Silent Storm: Chasovye (Disc 2) Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Orly's Draw-A-Story | PC | | Original | | | |
| Overlord | PC | 1.0 | Original | | MOVL1CDFC00 | |
| Overlord II | PC | 1.0 | Original | | MOVL2CDUS00 | |
| Overlord: Raising Hell | PC | 1.3 | Original | | MOVLRCDEU00 | |
| Outcast (Disc 1) | PC | | Original | | OUTCAPC52F/A1 | |
| One Two Animal: Let's Animal Series 1 ワンツーあにまる レッツあにまるシリーズ1 | PC | | Original | | LAOA-96101 | |
| Official Xbox Magazine Game Disc 54 | XBOX | | Original | | IM-214 | |
| Official Xbox Magazine Game Disc 109 | XBOX360 | | | | IM-2145 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.3 | The Learning Company | | OAE744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | 1.3 | The Learning Company | | OAE744BE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.3 | The Learning Company | | OAE744BE-CD3 | |
| Official Xbox Magazine Game Disc 73 | XBOX360 | | | | IM-2052 | |
| Operation Thunderstorm | PC | 1.0 | Original | | | |
| Operation Darkness オペレーション・ダークネス | XBOX360 | | Original | | SU-2001 | |
| Official Xbox Magazine Game Disc 46 | XBOX | | Original | | IM-046 | |
| Outpost | PC | | Original | | S 390121012ZZZ | |
| Online Pro Wrestling オンラインプロレスリング | PS2 | 1.03 | Original | | SLPM 65586 | |
| Das Offizielle PlayStation 2 Magazin 09/2004 OPS2M Uncut Edition 09/04 | PS2 | 1.02 | | | SCED-52089 … | |
| Das Offizielle PlayStation 2 Magazin 12/2003 ops2m demo uncut edition 12/2003 | PS2 | 1.00 | | | SCED-51936 | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 1) (Prunksaal/Impressionen) | CDI | | Original | | 0103313 | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 2) (Sammlungen) | CDI | | Original | | 0103313 | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 3) (Apokalypse) | CDI | | Original | | 0103313 | |
| Oblachno, vozmozhny osadki v vide frikadelek Облачно, возможны осадки в виде фрикаделек | PSP | 1.00 | Original | | ULES-01361 | |
| Obscure (Disc 1) ObsCure | PC | | Original | | | |
| Obscure (Disc 2) ObsCure | PC | | Original | | | |
| Obscure (Disc 3) ObsCure | PC | | Original | | | |
| Obscure (Disc 4) ObsCure | PC | | Original | | | |
| Ozzie's World オジィーズワールド | PC | | Original | | ASOW-71110 | |
| Obsidian (Disc 1) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 2) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 3) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 4) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 5) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Das Offizielle Xbox-Magazin: Cover-DVD 04/2003 | XBOX | | Original | | IM-015 | |
| Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 | |
| Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 | |
| Das Offizielle PlayStation 2 Magazin: Special Edition 2 german special edition demo 2 | PS2 | 1.00 | | | SCED-51161 | |
| Oilman オイルマン | 3DO | | Hibaihin | | OIL-9610 | |
| Ovation | ARCH | 1.48S | | | 00139 | |
| Ore no Imouto ga Konna ni Kawaii wake ga Nai Portable 俺の妹がこんなに可愛いわけがない ポータブル | PSP | 1.01 | Original, Limited Edition | | ULJS 00356 … | |
| Operaciya "Plastilin" (Disc 1) Операция "Пластилин" | PC | | Original | | | |
| Operaciya "Plastilin" (Disc 2) Операция "Пластилин" | PC | | Original | | | |
| Orda: Severnyj veter Орда: Северный ветер | PC | | Original | | | |
| ODN Palm Power Pack | PALM | | Original | | | |
| Oh!X 1999 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 1999 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | | |
| Oh!X 1998 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 1998 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | | |
| Oh!X 2001 Spring Special CD-ROM | X68K | | | | | |
| Oh!X 1999 Summer Special CD-ROM | X68K | | | | | |
| Oh!X 2000 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 2000 Spring Special CD-ROM (Part 2) | X68K | | | | | |
| Open Season | XBOX360 | | Original | | US-2024 | |
| Overlord: Raising Hell | PC | 1.3 | Original | | | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 101 | XBOX360 | | | | IM-2147 | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 106 | XBOX360 | | | | IM-2152 | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 109 | XBOX360 | | | | IM-2155 | |
| Oro e Gloria: La Strada per El Dorado | PC | | Covermount | | | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 103 | XBOX360 | | | | IM-2149 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1.1 | Rerelease | | OTF744BE-CD1 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1.1 | Rerelease | | OTF744BE-CD2 | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1.1 | Rerelease | | OTF744BE-CD3 | |
| Outlaws: Die Gesetzlosen (Disc 1) | PC | 1.1.1 | Original | | | |
| Outlaws: Die Gesetzlosen (Disc 2) | PC | 1.1.1 | Original | | | |
| Oregano Oregano: RISC OS Web Browser | ARCH | | Original | | | |
| One Piece: Kaizoku Musou 2 One Piece 海賊無雙 2 | PS3 | 01.00 | Original | | BLAS 50597 | |
| Ouka: Kokoro Kagayakaseru Sakura 桜華 ~心輝かせる桜~ | PS2 | 1.01 | Original | | SLPM 66406 | |
| Oha Suta Series 01: Zonapara おはスタシリーズ01 象南波羅~ゾナパラ~ | KSITE | | Original | | 536956 | |
| Oha Suta Series 02: Oha Ska! おはスタシリーズ02 おは スカ | KSITE | | Original | | 538714 | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition (Xplosiv) | | EI-1685-1 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.004 | Game of the Year Edition (Xplosiv) | | EI-1685-2 | |
| Objectif Transparence | CDI | | Original | | RP IND 4 94 | |
| Official PlayStation 2 Magazine: German Kids Special OPS2 Ger Kids Special/DEM/GER | PS2 | 1.00 | | | SCED-53611 | |
| One-derful Theater ONEだふるシアター | X68K | | | | | |
| Overlord BGamer 153 (Side A) | PC | | Covermount | | | |
| Odin Sphere 오딘 스피어 | PS2 | 1.00 | Sample | | SCKA 20107 | |
| Omgaan met Steriele Medische Hulpmiddelen Omgaan met Steriele Medische Hulp-Middelen | CDI | | Original | | | |
| Omgaan met Steriele Medische Hulpmiddelen | CDI | | Demo | | | |
| OSHA MHE Forklifts OSHA MHE Forklifts: PFS Interactive Training | CDI | | Original | | | |
| Oddballz: Your Wacky Computer Petz | PC | 1.0 | Original | | CS090370 | |
| Operaciya "Blau" Операция "Блау" | PC | | Original | | | |
| Operaciya "Barbarossa" Операция "Барбаросса" | PC | | Original | | | |
| Otome wa Boku ni Koishiteru 乙女はお姉さまに恋してる | PS2 | 1.05 | Original | | SLPM 66165 | |
| Ore no Shita de Agake 俺の下で AGAKE | PS2 | 1.01 | Original | | SLPS 25796 | |
| Opsys | PC | | Original | | | |
| The Orion Conspiracy | PC | 1.01 | Original | | | |
| Obsidian (Disc 1) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 2) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 3) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 4) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 5) | PC | | Original, Complimentary Copy | | 11008 | |
| Operation Flashpoint: Gold Upgrade Operace Flashpoint: Gold Upgrade | PC | | Original | | | |
| Otome wa Oanesama Boku ni Koi Shiteru Portable 乙女はお姉さまに恋してる Portable | PSP | 1.02 | Original | | ULJM 05647 | |
| Operation: Surgery Has Never Been so Silly! | PC | | Replay Kids | | OPERPCREGB/A | |
| Overwatch | PC | | Game of the Year Edition, Legendary Edition | | 73052010US, S7302210 | |
| Osouji Sentai Clean Keeper H お掃除戦隊 くりーんきーぱーはいぱーH | PS2 | 1.01 | Original | | SLPM 55220 | |
| Oni | PC | 1.0 | Covermount | | | |
| Official PlayStation 2 Magazine Demo 32 | PS2 | 1.00 | | | SCED-51656 | |
| Otona no Gal-jong 2: Koishite Bai Man! おとなのギャル雀2 恋して倍満! | PS2 | 1.01 | Original | | SLPM 66194 | |
| The Oregon Trail | PC | 1.22 | Smart Saver | | ORT844AE-CD | |
| Onikiri-den 鬼斬伝 | PC | | Original | | ZEUS-00001 | |
| Orgazumi (Disc 1) オーガズミー | PC | | Original | | FCG013 | |
| Orgazumi (Disc 2) オーガズミー | PC | | Original | | FCG014 | |
| Official PlayStation 2 Magazine Demo 34 | PS2 | 1.01 | | | SCED-51760 | |
| Official PlayStation 2 Magazine Demo 41 | PS2 | 1.00 | | | SCED-52158 | |
| Official PlayStation 2 Magazine Demo 30 | PS2 | 1.00 | | | SCED-51552 | |
| Official PlayStation 2 Magazine Demo 26 | PS2 | 1.00 | | | SCED-51321 | |
| Oddworld: Abe's Exoddus: UK Packaging | MAC | | Art Assets | | | |
| Oddworld: Abe's Exoddus: US Manual | MAC | | Art Assets | | | |
| Official PlayStation 2 Magazine Demo 15 | PS2 | 1.00 | | | SCED-50708 | |
| Official PlayStation 2 Magazine Demo 23 | PS2 | 1.10 | | | SCED-51163 | |
| Official PlayStation 2 Magazine Demo 54 | PS2 | 1.00 | | | SCED-53067 | |
| Oh's Talk English (Disc 1) 오석태의 말하는 영어 | PSP | 1.02 | Original | | ULKS 46082 | |
| Oh's Talk English (Disc 2) 오석태의 말하는 영어 | PSP | 1.02 | Original | | ULKS 46083 | |
| Open Season (Disc 1) | PC | 1.00 | Original | | | |
| Oregon Trail II | PC | 1.32 | Rerelease | | #HCD744CE-CD | |
| Outpost | PC | | SierraOriginals | | S4941220Z12Z2 | |
| Ōkami | WII | | Beta | | | |
| Ousama Monogatari 王様物語 | WII | | Beta | | | |
| Obscure: The Aftermath ObsCure: The Aftermath | WII | | Beta | | | |
| Onslaught | WII | | Beta | | | |
| Order Up! | WII | | Beta | | | |
| Olympic Games: Atlanta 1996 | PC | | Original | | | |
| Orion Burger | PC | | Original | | | |
| Outpost 2: Geteilte Bestimmung | PC | 1.0 | Original | | S0011248 | |
| OnHand Sports Games / Sega Swirl Lite | PALM | PDA105-01 | OnHand Double Pack (Sports Games/Astrologer) | | PDA105-01 | |
| OnHand Complete Astrologer OnHand Complete Astrologer: Horoscopes & More! | PALM | PDA108-01 | OnHand Double Pack (Sports Games/Astrologer) | | PDA108-01 | |
| Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLJM 60152 | |
| On Air | PC | | Original | | BROWNIE 990201 | |
| Opel Corsa '97 | PHOTO-CD | | Original | | | |
| Opel IAA '97 | PHOTO-CD | | Original | | | |
| Opel Vectra '99 | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 1) (Model Range) | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 2) (Opel Highlights) | PHOTO-CD | | Original | | | |
| The Official Xbox 50 Best Games 20 Games to Play | XBOX | | | | IM-001 | |
| Outlast: A Reading for Information Game | PC | | Original | | HH824 | |
| The Orange Box (Disc 1) | PC | | Original | | | |
| The Orange Box (Disc 2) | PC | | Original | | | |
| Ozawa-Ken+ | PC | | Original | | | |
| Oynayarak Ogreniyorum 1 Oynayarak Öğreniyorum 1 | PC | | Original | | | |
| Obsidian (Disc 1) オブシディアン | PC | | Original | | INR-1003 | |
| Obsidian (Disc 2) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 3) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 4) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 5) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian | PC | 1.0 | Demo | | | |
| Onible'jd Ониблэйд | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition | | S0025036 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.004 | Game of the Year Edition | | S0025037 | |
| Outrage | PC | | Original | | | |
| Ogallala: Das Kartenspiel für PC | PC | | Original | | ECD000799D 00031111-001 | |
| Outbreaker | PC | | Original | | | |
| Ore no Ryouri 俺の料理 | PSX | | Taikenban | | PAPX 90089 | |
| Oil Tycoon | PC | 1.0 | Original | | | |
| Opera Fatal | PC | | Tandem | | 1444 | |
| Othello CD-ROM | PC | | Original | | | |
| Operation Barbarossa: The Struggle for Russia | PC | | Original | | | |
| Operaciya Silent Storm (Disc 1) Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Operaciya Silent Storm (Disc 2) Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Olimpiada Zimowa 2002 Olimpijskie Zmagania 2002 | PC | | Original | | | |
| Ori and the Blind Forest: Definitive Edition | PC | 5.3.2.9582331 | Limited Edition | | | |
| Oh-chan no Oekaki Logic 2 おーちゃんのお絵かきロジック2 | PSX | | Original | | SLPS 00345 | |
| Onimusha: Put' samuraya (Disc 1) (Igrovoj) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 2) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 3) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 4) Onimusha: Путь самурая | PC | | Original | | | |
| Ochazukenori: Kaiki!! Mushi Danshaku no Yakata 御茶漬海苔 怪奇!!蟲男爵の館 | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition (BestSeller Series) | | JCPL11, S0026695 | |
| Ouran Koukou Host Club 桜蘭高校ホスト部 | PS2 | 1.01 | Original | | SLPM 66738 | |
| Oyunlarla Dil Bilgisi Oyunlarla Matematik | PC | | Original | | | |
| Omerta: Chinmoku no Okite: The Legacy オメルタ ~沈黙の掟~ THE LEGACY | PSP | 1.01 | Shokai Goukaban | | ULJM 06393 | |
| Oksfordzka Encyklopedia Historii Świata | PC | | Covermount | | SELL 0103 | |
| Obitel' t'my: Sumerki Обитель тьмы: Сумерки | PC | 1.1 | Original | | | |
| The Official Xbox Magazine: Australia & New Zealand: Issue 108 | XBOX360 | | | | IM-2154 | |
| Obitaemyj ostrov Обитаемый остров | PC | | Original | | | |
| Obitaemyj ostrov: Chuzhoj sredi chuzhix Обитаемый остров: Чужой среди чужих | PC | | Original | | | |
| Obitaemyj ostrov: Zemlyanin Обитаемый остров: Землянин | PC | | Original | | | |
| Over 350 Jigsaw Puzzles | PC | | Original | | 012163 | |
| Over 350 Solitaire Games | PC | | Original | | | |
| Oil Tycoon 2 | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast | PC | | eXtra Klasyka XK HIT | | TS OCC PL | |
| Ovech'i bega Овечьи бега | PC | 1.0 | Original | | | |
| Onsen de Takkyuu 温泉de卓球 | PC | | Original | | | |
| Only One 2: Bijin Casino Dealer Hitomi: Sei no Roulette オンリーワン2 美人カジノディーラー瞳 性のルーレット | PC | | Original | | ON2-HITO | |
| Ōkami 오오카미 | PS2 | 1.00 | Original | | SCKA 20095 | |
| One Piece: Grand Battle! Rush 원피스 그랜드배틀! RUSH | PS2 | 1.00 | Original | | SLKA 25299 | |
| Odo Odo Oddity おどおど おっでぃ | PSX | | Hibaihin | | SLPM 80075 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures | PC | 1.0 | DVD-ROM | | ORG811AE-DVD | |
| Opera House Preview Disc オペラハウス プレビューディスク | PC | | Original | | | |
| Opera House Preview Disc #2 オペラハウス プレビューディスク #2 | PC | | Original | | | |
| Oil Tycoon 2 | PC | | Covermount | | | |
| Outcry (Disc 1) Outcry: The Dawn | PC | Version DPV 1.0 | Original | | PCO596CD | |
| Outcry (Disc 2) Outcry: The Dawn | PC | Version DPV 1.0 | Original | | PCO596CD | |
| Oxford Handbook of Clinical Medicine for PDAs: Seventh Edition | PALM | 10.0.05/2007.9.7 | | | | |
| Oh-chan no Oekaki Logic for Palm おーちゃんのお絵かきロジック for Palm | PALM | 1.04 | Original | | | |
| Otome-teki Koi Kakumei: Love Revo!! 乙女的恋革命★ラブレボ!! | PS2 | 1.03 | Love Revo Box | | SLPM 66237 | |
| Operator's Side オペレーターズサイド | PS2 | 1.02 | Original | | SCPS 15039 | |
| Oudou Aniki 王道兄貴 | PC | 1.20b | Original | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2a | Bundle Version Compaq Presario OEM | | | |
| Operation Flashpoint: Dragon Rising 오퍼레이션 플래시포인트: 드래곤 라이징 | PS3 | 01.01 | Original | | BLKS 20157 | |
| Ostrich Runner | PC | | Microforum | | | |
| Ost-Indskaya kompaniya: Zolotoe izdanie Ост-Индская компания: Золотое издание | PC | | Original | | | |
| Owlboy (Game Disc) | PC | 0.0.6152.604 | IndieBox | | | |
| Original Xbox Game Support: August 2006 (1.5) | XBOX360 | | | | | |
| Obscure ObsCure | PC | 1.1 | Covermount | | | |
| Order of War: Osvobozhdenie Order of War: Освобождение | PC | | Igromaniya: Vybor redakcii | | | |
| Order of War: Stolknovenie Order of War: Столкновение | PC | | Igromaniya: Vybor redakcii | | | |
| Official PlayStation 2 Magazine Demo 70 | PS2 | 2.00 | | | SCED-54024 | |
| Ob"ekt 69: Kasablanka Объект 69: Касабланка | PC | | Original | | RUSSOBIT-M 2003/408 | |
| Ona: Sbornik e'roticheskix igr Она: Сборник эротических игр | PC | | Original | | 10-20999 | |
| Ob"ekt 69: Mest' Krassera Объект 69: Месть Крассера | PC | | Original | | | |
| Otchayannye domoxozyajki (Disc 1) (Ustanovochnyj disk) Отчаянные домохозяйки | PC | | Original | | | |
| Otchayannye domoxozyajki (Disc 2) (Ustanovochnyj disk) Отчаянные домохозяйки | PC | | Original | | | |
| Otchayannye domoxozyajki (Disc 3) (Igrovoj disk) Отчаянные домохозяйки | PC | | Original | | | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| Ocean Jewels | PC | | Red Rocks | | | |
| Obsidian (Disc 1) | PC | | Original | | 11008 | |
| Obsidian (Disc 5) | PC | | Original | | 11008 | |
| Obratnyj otschet Обратный отсчет | PC | v.1 1.06.10.22 | Original | | | |
| The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| Othelanian Wars オセラニアン・ウォーズ | PC | | Original | | | |
| Oficery: Special'noe izdanie Офицеры: Специальное издание | PC | 1.18.2 | Original | | | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| Open Season Boog & Elliot | PC | 1.0 | Demo | | | |
| Orly Pervoj mirovoj Орлы Первой мировой | PC | 02.19.07 | Original | | | |
| Olivers Äventyr: Drakens Förbannelse | PC | | Original | | 021120110 | |
| Outlaws (Disc 1) | PC | 1.0 Build 3 | Bundle Version Diamond OEM | | 644430 | |
| Outlaws (Disc 2) | PC | 1.0 Build 3 | Bundle Version Diamond OEM | | 644431 | |
| Oda Nobunaga Den 織田信長伝 | PC | 1.0 | Original | | KN11-93101 | |
| Osaka Ennichi 大阪緣日 | PC | | Original | | OE-V1.00 | |
| Open Season | PS2 | 1.01 | Review | | | |
| O'boy-jakten | PC | | Original | | | |
| One Piece: Pirates Carnival 원피즈 해적카니발 | PS2 | 1.01 | Original | | SLKA 25351 | |
| OutRun 2006: Coast 2 Coast | PSP | 1.00 | Original | | ULKS 46087 | |
| Onsalakorv | PC | | Original | | | |
| OnHand Chess / Sega Swirl Lite | PALM | PDA103-01 | Original | | PDA103-01 | |
| Das Offizielle PlayStation 2 Magazin 13/2003: Uncut Edition ops2m uncut edition 13/03 | PS2 | 1.00 | | | SCED-51937 | |
| On-Robot Он-Робот | PC | 1.14SB | 1C: Igrushki | | | |
| Ostrov e'rotiki Остров эротики | PC | | Original | | | |
| Otverzhennye: Tajna temnoj rasy (Disc 2) Отверженные: Тайна темной расы | PC | | 1C: Igrushki | | SNOW OT21 0110 IR | |
| OIO: The Game: Enlarged | PC | | F*ckn' Best of Independent Games: Collection Vol. 1 | | | |
| OnlineGamez | PC | | | | | |
| Oil Rush | PC | | Original | | | |
| The Official Xbox Live Disc | XBOX | | Original | | IM-001 | |
| The Official Xbox Playable Cheats | XBOX | | Original | | IM-001 | |
| Online G@mer n. 5: Juin/Juillet 2001 (Disc 1) | PC | | | | | |
| Oktoberfest Wiesn-Gaudi | PC | 1.0 | Original | | | |
| Osterspiele-Box Oster Spielebox | PC | | Original | | | |
| Ore no Shita de Agake 俺の下であがけ | PC | System3.9 Ver.5.43 | Original | | ALB-005 | |
| Original War (Disc 1) | PC | | Original | | | |
| Original War (Disc 2) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | CD-W95-166-E | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | CD-W95-166-E | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | CD-W95-166-E | |
| OutRun 2006: Coast 2 Coast | PC | | Top Games | | SEGA-PC029 | |
| O.R.B: Off-World Resource Base | PC | | Covermount | | | |
| Original War (Disc 1) | PC | 1.02 | Covermount | | | |
| Original War (Disc 2) | PC | 1.02 | Covermount | | | |
| Osaka City 大阪 | PHOTO-CD | | Original | | | |
| Original War (Disc 1) | PC | 1.02 | Original | | CD-W95-V006-IT1 | |
| Original War (Disc 2) | PC | 1.02 | Original | | CD-W95-V006-IT2 | |
| Oni no Kamen 鬼ノ仮面 | PC | 1.00 | Original | | | |
| OMSI: Der Omnibussimulator | PC | 1.04 | OMSI Bundle | | | |
| OMSI Add-on: Wien: Der Hochflurbus LU 200 | PC | 1.0 | OMSI Bundle | | | |
| Otousan no Tame no Tsuri: Fly Fishing-hen お父さんのための釣り フライ フィッシング編 | PC | | Original | | TFF-058-1 | |
| The Operative: No One Lives Forever (Disc 1) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ1, FXX08903223D1 | |
| The Operative: No One Lives Forever (Disc 2) (In the Lounge with No One Lives Forever) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ2 | |
| Omikron: The Nomad Soul | PC | | Promo | | | |
| Opera House Preview Disc #2.3 オペラハウス プレビューディスク #2.3 | PC | | Original | | | |