Region | Title | System | Version | Edition | Languages | Serial | Status |
 | One Piece: Unlimited World R | PS3 | 01.01 | Original | | BLAS 50699 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition | | |  |
 | Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | |  |
 | O-to-i-re: Dreamcast Sequencer お・と・い・れ ドリームキャストシーケンサー | DC | 1.002 | Original | | T-32801M |  |
 | O.G.A Onigokko Royal: Hunter wa Field de Koi o Suru O*G*A 鬼ごっこロワイアル ハンターは孤島(フィールド)で恋をする | PSP | 1.01 | Genteiban | | ULJM 06298 |  |
 | Oasis Road オアシスロード | PSX | | Original | | SLPS 01899 |  |
 | Obbligato (Taikenban CD-ROM) オブリガート 体験版CD-ROM | PC | | Demo | | |  |
 | Obsidian (Disc 1) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obsidian (Disc 1) オブシディアン | PC | | Original | | INR-1003 |  |
 | Obsidian (Disc 1) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 2) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obsidian (Disc 2) オブシディアン | PC | | Original | | INR-1002 |  |
 | Obsidian (Disc 2) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 3) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obsidian (Disc 3) オブシディアン | PC | | Original | | INR-1002 |  |
 | Obsidian (Disc 3) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 4) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obsidian (Disc 4) オブシディアン | PC | | Original | | INR-1002 |  |
 | Obsidian (Disc 4) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 5) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obsidian (Disc 5) オブシディアン | PC | | Original | | INR-1002 |  |
 | Obsidian (Disc 5) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Ochazukenori: Kaiki!! Mushi Danshaku no Yakata 御茶漬海苔 怪奇!!蟲男爵の館 | PC | | Original | | |  |
 | Ochigee Designer Tsukutte Pon! 落ちゲー・デザイナー 作ってポン! | SS | 1.090 | Original | | T-9108G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oda Nobunaga Den 織田信長伝 | PSX | | Original, Koei the Best | | SLPM 86337 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oda Nobunaga Den 織田信長伝 | PC | 1.0 | Original | | KN11-93101 |  |
 | Odama 大玉 | GC | Rev 1 | Bundled with Microphone | | DL-DOL-GOOJ-JPN | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Odin Sphere オーディン・スフィア | PS2 | 1.02 | Original, PlayStation 2 the Best | | SLPM 66474 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | ODN Palm Power Pack | PALM | | Original | | |  |
 | Odo Odo Oddity おどおど おっでぃ | PSX | | Hibaihin | | SLPM 80075 |  |
 | Odo Odo Oddity おどおどおっでぃ | PSX | | Original | | SLPS 00754 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Odoru Made in Wario おどる メイド イン ワリオ | WII | | Original | | RVL-RODJ-JPN |  |
 | Off-World Interceptor オフ‐ワールド・インターセプター | 3DO | | Original | | FZ-SJ3151 |  |
 | Off-World Interceptor Extreme オフワールド・インターセプター エクストリーム | PSX | | Original | | SLPS 00122 |  |
 | Off-World Interceptor Extreme オフワールド・インターセプター エクストリーム | SS | 1.000 | Ketteiban | | T-15901G |  |
 | Official Disc 2003 | PS2 | 1.01 | Taikenban | | PAPX 90507 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Fan Book: Circadia: Special CD-ROM オフィシャルファンブック サーカディア | PSX | | Original | | SCZS 94106 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Yarudora Fan Book: Double Cast: CD-ROM Special Data-shuu オフィシャルやるドラファンブック ダブルキャスト | PSX | | Original | | SCZS 94101 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Yarudora Fan Book: Kisetsu o Dakishimete オフィシャルやるドラファンブック 季節を抱きしめて | PSX | | Original | | SCZS 94102 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Yarudora Fan Book: Sampaguita オフィシャルやるドラファンブック サンパギータ | PSX | | Original | | SCZS 94103 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Yarudora Fan Book: Yukiwari no Hana: CD-ROM Special Data-shuu オフィシャルやるドラファンブック 雪割りの花 | PSX | | Original | | SCZS 94104 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oh!PC 1998-nen 10-gatsu-gou Tokubetsu Furoku CD-ROM Oh!PC 1998年 10月号 特別付録CD-ROM | PC | | | | OHPC-9810 |  |
 | Oh!PC 1998-nen 11-gatsu-gou Tokubetsu Furoku CD-ROM Oh!PC 1998年 11月号 特別付録CD-ROM | PC | | | | OHPC-9811 |  |
 | Oh!PC 1998-nen 8-gatsu-gou Tokubetsu Furoku CD-ROM Oh!PC 1998年 8月号 特別付録CD-ROM | PC | | | | OHPC-9808 |  |
 | Oh!PC 1998-nen 9-gatsu-gou Tokubetsu Furoku CD-ROM Oh!PC 1998年 9月号 特別付録CDーROM | PC | | | | OHPC-9809 |  |
 | Oh!X 1998 Spring Special CD-ROM (Part 1) | X68K | | | | |  |
 | Oh!X 1998 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | |  |
 | Oh!X 1999 Spring Special CD-ROM (Part 1) | X68K | | | | |  |
 | Oh!X 1999 Spring Special CD-ROM (Part 2) (Sampler Disc) | 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 | | | | |  |
 | Oh!X 2001 Spring Special CD-ROM | X68K | | | | |  |
 | Oha Suta Dance Dance Revolution おはスタ ダンス ダンス レボリューション | PSX | | Original | | SLPM 86603 |  |
 | Oha Suta Produce! Gentei Collabo Game Disc!! おはスタプロデュース!限定コラボゲームディスク!! | WII | | Limited Edition | | RVL-DCHJ-JPN |  |
 | Ohenro-San: Hosshin no Dojo (Awa Kuni) Hen お遍路さん 発心の道場(阿波国)編 | GC | | Original | | DL-DOL-GODJ-JPN |  |
 | Oja Majo DoReMi Dokkan! Nijiiro ParaDice おジャ魔女どれみドッカ~ン! にじいろパラダイス | PSX | | Original | | SLPS 03497 |  |
 | Ojarumaru: Pasokon Yarou Yo! Mouse de Jigsaw Puzzle おじゃる丸 パソコンやろうよ! マウスでジグソーパズル | PC | | Original | | |  |
 | Okashina Mother Goose: Mixed-Up Mother Goose おかしなマザー・グース | FMT | | Original | | HMB-235 |  |
 | Okudera Yasuhiko no Sekai o Mezase! Soccer Kids: Nyuumon-hen 奥寺康彦の世界をめざせ! サッカー・キッズ 入門編 | SS | 1.310 | Original | | T-26001G |  |
 | Ollie King オーリーキング | CHIHIRO | 1.003 | Original | | GDX-0007 |  |
 | Omiai Commando: Ba-Couple ni Tsukkomi o お見合いコマンドー ~バカップルにつっこみを~ | PSX | | Original | | SLPM 86439 |  |
 | Omise de Tenshu おみせde店主 | PSX | | Original | | SLPS 01876 |  |
 | Omoide ni Kawaru Kimi: Memories Off 想い出にかわる君 ~Memories Off~ | DC | 1.001 | Original | | T-19718M |  |
 | Omoide ni Kawaru Kimi: Memories Off 想い出にかわる君 -Memories Off- | PS2 | 1.01 | Original | | SLPS 25173 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Grand Battle! 3 ONE PIECE ~グランド・バトル!3~ | GC | | Original | | DL-DOL-GOGJ-JPN | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Grand Battle! 3 ONE PIECE グランドバトル!3 | PS2 | 1.02 | Original | | SLPS 25315 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Grand Battle! Rush ワンピース グラバト! ラッシュ | GC | | Original | | DL-DOL-GOPJ-JPN |  |
 | One Piece: Grand Battle! Rush ワン・ピース ~グラバト!ラッシュ~ | PS2 | 1.01 | Original | | SLPS 25473 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Pirates Carnival ワンピース パイレーツカーニバル | GC | | Original | | DL-DOL-GIPJ-JPN | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Round the Land! ワンピース ランドランド! | PS2 | 1.01 | Original | | SLPS 25382 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Unlimited Adventure ワンピース アンリミテッドアドベンチャー | WII | | Original | | RVL-RIPJ-JPN |  |
 | One Piece: Unlimited Cruise: Episode 1: Nami ni Yureru Hihou ワンピース アンリミテッドクルーズ エピソード1 波に揺れる秘宝 | WII | Rev 1 | Minna no Osusume Selection | | RVL-ROUJ-JPN-B0 |  |
 | One Piece: Unlimited Cruise: Episode 2: Mezameru Yuusha ワンピース アンリミテッドクルーズ エピソード2 目覚める勇者 | WII | | Original | | RVL-RIUJ-JPN |  |
 | One Piece: Unlimited Cruise: Episode 2: Mezameru Yuusha ワンピース アンリミテッドクルーズ エピソード2 目覚める勇者 | WII | Rev 1 | Original | | RVL-RIUJ-JPN-B0 |  |
 | One Piece: Unlimited World R ワンピース アンリミテッドワールド R | PS3 | 01.01 | Original | | BLJS 10272 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One-derful Theater ONEだふるシアター | X68K | | | | |  |
 | Onee-san to Issho! Janken Paradise お姉さんといっしょ! じゃんけん パラダイス | 3DO | | Original | | FZ-SJ5251 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onee-san to Issho! Kisekae Paradise お姉さんといっしょ! 着せ替え パラダイス | 3DO | | Original | | FZ-SJ5252 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oneechanbara VorteX: Imichi o Tsugu Mono-tachi お姉チャンバラ vorteX ~忌血を継ぐ者たち~ | XBOX360 | | Original | | DP-2002 |  |
 | Oneechanbara Z: Kagura お姉チャンバラZ~カグラ~ | XBOX360 | | Original | | DP-2036 |  |
 | Onegai Countdown おねがいカウントダウン | PC | | Original | | YMH-0013 |  |
 | Ongaku Tkool: Kanadeeru 2 音楽ツクール かなで~る2 | PSX | | Original | | SLPS 00903 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | The Oni Taiji!!: Mezase! Nidaime Momotarou The鬼退治!! 目指せ!二代目桃太郎 | PSX | | Original | | SLPS 00089 |  |
 | The Oni Taiji!!: Mezase! Nidaime Momotarou The鬼退治!! 目指せ!二代目桃太郎 | PSX | | Major Wave | | SLPM 86989 |  |
 | Onikiri-den 鬼斬伝 | PC | | Original | | ZEUS-00001 |  |
 | Onimusha Buraiden 鬼武者 無頼伝 | PS2 | 1.02 | Original | | SLPM 65411 |  |
 | Online Games: Dai Guru Guru Onsen オンラインゲームズ 大ぐるぐる温泉 | PS2 | 1.01 | Original | | SLPM 62195 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Only One 2: Naomi: Ai no Inori ga Todoku Toki オンリーワン2 なおみ 愛の祈りが届く時 | PC | 1.0.0.1 | Original | | ON2-NAO |  |
 | Only You: Sekai no Namida to Shoujo no Hanashi: Prelude Only You -世界の涙と少女のハナシ- Prelude | PC | 1.00 | Trial Edition version:share II | | |  |
 | Onsen de Takkyuu 温泉de卓球 | PC | | Original | | |  |
 | Onsen Ryokou Kakumei: Ich liebe dich.! 温泉旅行革命 ~Ich liebe dich.!~ | PC | 1.00 | Original | | RUCCA-003 |  |
 | Ooedo Fuusui Ingaritsu: Hanabi 2 大江戸風水因果律 花火2 | PSX | | Original | | SLPS 02814 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ooedo Renaissance 大江戸ルネッサンス | SS | 1.001 | Original | | T-9104G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ooedo Senryoubako 大江戸千両箱 | PSP | 1.01 | Original | | ULJM 05099 |  |
 | Oogami Ichirou Funtouki: Sakura Taisen Kayou Show "Beni Tokage" yori (Disc 1) 大神一郎奮闘記 〜サクラ大戦歌謡ショウ「紅蜥蜴」より〜 | DC | 1.000 | Original, Sample | | HDR-0057 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oogami Ichirou Funtouki: Sakura Taisen Kayou Show "Beni Tokage" yori (Disc 2) 大神一郎奮闘記 〜サクラ大戦歌謡ショウ「紅蜥蜴」より〜 | DC | 1.000 | Original, Sample | | HDR-0057 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ookami-teki Monshou: Crest of Wolf 狼的紋章 クレスト・オブ・ウルフ | PCE | | Original | | HCD3044 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ookami: Fude-hajime no Maki 大神 筆はじめノ巻 | PS2 | 1.01 | Taikenban | | SLPM 61124 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ooumi Nobunaga Den: Geten II 大海信長伝・下天II | PSX | | Original | | SLPS 00874 |  |
 | Oozora ni Kodawarou! Minna no Kuukou 2 大空にこだわろう! みんなの空港2 | PC | | | | |  |
 | 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 | | |  |
 | 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 | | |  |
 | Operation Darkness オペレーション・ダークネス | XBOX360 | | Original | | SU-2001 |  |
 | Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 |  |
 | Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLJM 60152 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 |  |
 | Operation Flashpoint: Red River | PC | | Kakaku Kaiteihan | | FBG028W000A10 |  |
 | Operation Flashpoint: Red River | PS3 | 01.02 | Original, Codemasters the Best | | BLJM 60361 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Operator's Side オペレーターズ・サイド | PS2 | 1.02 | Doukonban, Doukonban: PlayStation 2 the Best | | SCPS 15038 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Operator's Side オペレーターズサイド | PS2 | 1.02 | Original | | SCPS 15039 |  |
 | Ore ga Kantoku da! Gekitou Pennant Race オレが監督だ! ~激闘ペナントレース~ | PS2 | 1.03 | Original | | SLPM 65005 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ore ga Kantoku da! Volume 2: Gekitou Pennant Race オレが監督だ!Volume.2 ~激闘ペナントレース~ | PS2 | 1.04 | Original | | SLPM 65056 |  |
 | Ore no Imouto ga Konnani Kawaii Wake ga Nai. Happy End 俺の妹がこんなに可愛いわけがない。 ハッピーエンド | PS3 | 01.01 | Original | | BLJS 10238 |  |
 | Ore no Shita de Agake 俺の下で AGAKE | PS2 | 1.01 | Original | | SLPS 25796 |  |
 | Ore no Shita de Agake 俺の下であがけ | PC | System3.9 Ver.5.43 | Original | | ALB-005 |  |
 | Ore no Yome: Anata dake no Hanayome 俺の嫁 ~あなただけの花嫁~ | XBOX360 | | Original | | IF-2008 |  |
 | Oretachi Geesen Zoku: Akumajou Dracula オレたちゲーセン族 悪魔城ドラキュラ | PS2 | 1.01 | Original | | SLPM 62729 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oretachi Geesen Zoku: Karate-dou オレたちゲーセン族 空手道 | PS2 | 1.01 | Original | | SLPM 62628 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Oretachi Geesen Zoku: Thunder Cross オレたちゲーセン族 サンダークロス | PS2 | 1.02 | Original | | SLPM 62744 |  |
 | Oshidashi Zintrick ~ ZinTricK 押し出しジントリック | NGCD | | Original | | ADCD-104 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Othello World II: Yume to Michi e no Chousen オセロワールドII 夢と未知への挑戦 | PSX | | Original, Fukkokuban | | SLPS 00136 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Other Life Azure Dreams アザーライフ アザードリームス | PSX | | Original | | SLPM 86047 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oto to E no Deru Eigo Jisho No. 1: Start with Words 音と絵の出る英語辞書 No.1 「Start with Words」 | FMT | | Original, Rerelease | | HMA-217 |  |
 | 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 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otogi: Myth of Demons | XBOX | | Special Pack | | FS-002 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otomedius (System Disc) オトメディウス | KEA | JAA | Original | | GGGJAA01 |  |
 | Otomedius (Application Disc 1) オトメディウス | KEA | JAA | Original | | GGGJAA02 |  |
 | Otomedius (Application Disc 2) オトメディウス | KEA | JAA | Original | | GGGJAA03 |  |
 | Otomedius Excellent! オトメディウスX(エクセレント!) | XBOX360 | | Original | | KN-2074 |  |
 | Otomedius Gorgeous! オトメディウス ゴージャス! | XBOX360 | | Original | | KN-2030 |  |
 | 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 |  |
 | Oudou Aniki 王道兄貴 | PC | 1.20b | Original | | |  |
 | Oudou Yuusha 王道勇者 | PC | | Original | | ALS-0029 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oukoku no Grand Chef 王国のグランシェフ | 3DO | | Original | | FZ-SJ4252 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oumagatoki: Kaidan Romance 逢魔時 ~怪談ロマンス~ | PSP | 1.02 | Original | | ULJM 06039 |  |
 | Our Graduation: Mahjong de Pon! Hanafuda de Koi! (Disc 1) (Mahjong de Pon!) アワー グラデュエーション ~麻雀でポン 花札でコイ~ | PSX | | Original | | SLPS 02576 |  |
 | Our Graduation: Mahjong de Pon! Hanafuda de Koi! (Disc 2) (Hanafuda de Koi!) アワー グラデュエーション ~麻雀でポン 花札でコイ~ | PSX | | Original | | SLPS 02577 |  |
 | Out Live: Be Eliminate Yesterday アウトライブ Be Eliminate Yesterday | PSX | | Original | | SLPS 00746 |  |
 | Outdoor Wander Land アウトドアワンダーランド | MAC | | Original | | ILL-940715 |  |
 | Outer World アウター・ワールド | 3DO | | Original | | FZ-SJ3451 |  |
 | Outtrigger アウトトリガー | DC | 1.008 | Original | | HDR-0118 |  |
 | Over Drivin' DX オーバードライビンDX | PSX | | Original | | SLPS 00327 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Over Drivin' DX: Rally Edition オーバードライビンDX ラリーエディション | PSX | | Hibaihin | | SLPM 80032 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Over Drivin' III: Hot Pursuit オーバードライビンⅢ | PSX | | Taikenban Disc | | SLPM 80298 |  |
 | Over Drivin' IV オーバードライビンⅣ | PSX | | Taikenban Disc | | SLPM 80437 |  |
 | Over Drivin' IV オーバードライビンⅣ | PSX | | Original | | SLPS 02099 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Over the Monochrome Rainbow featuring Shogo Hamada | PS2 | 1.40 | Original | | SLPM 65271 |  |
 | OverBlood オーバーブラッド | PSX | | Original, PlayStation the Best | | SLPS 00392 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood オーバーブラッド | PSX | | Major Wave | | SLPM 86641 |  |
 | OverBlood 2 オーバーブラッド2 | PSX | | Special Movie-ban | | PAPX 90046 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood 2 (Disc 1) オーバーブラッド2 | PSX | | Original | | SLPS 01261 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood 2 (Disc 2) オーバーブラッド2 | PSX | | Original | | SLPS 01262 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood 2: The "East Edge" File オーバーブラッド2 -The "East Edge" File- | PSX | | Premium Disc | | SLPM 80270 |  |
 | OverTop オーバートップ | NGCD | | Original | | ADCD-011 |  |
 | Oyaji no Jikan: Nee-chan Hanafuda de Shoubu ya! おやじの時間 ~ねーちゃん花札で勝負や!~ | PSX | | Original | | SLPS 02591 |  |
 | Oyaji no Jikan: Nee-chan Mahjong de Shoubu ya! おやじの時間 ~ねーちゃん麻雀で勝負や!~ | PSX | | Renkaban | | SLPS 03262 |  |
 | Oyaji no Jikan: Nee-chan Tsuri Iku de! おやじの時間 ね~ちゃん釣り行くで! | PSX | | Original | | SLPS 02590 |  |
 | Oyako de Asobo: Miffy no Omochabako おやこ で あそぼ ミッフィーの おもちゃばこ | WII | | Original | | RVL-R3UJ-JPN-B0 |  |
 | 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 |  |
 | Ozzie's World オジィーズワールド | PC | | Original | | ASOW-71110 |  |
 | Odin Sphere 오딘 스피어 | PS2 | 1.00 | Sample | | SCKA 20107 |  |
 | Off-World Interceptor 혹성질주 | 3DO | | Original | | GDT-GA241 |  |
 | One Piece: Grand Adventure 원피스: 그랜드 배틀 어드벤처 | PS2 | 1.00 | Original | | SLKA 25388 |  |
 | One Piece: Grand Battle! Rush 원피스 그랜드배틀! RUSH | PS2 | 1.00 | Original | | SLKA 25299 |  |
 | One Piece: Round the Land! 원피스 라운드 더 랜드! | PS2 | 1.00 | Original | | SLKA 25208 |  |
 | Onimusha: Warlords | PS2 | 1.00 | Original | | SLPM 67507 |  |
 | Operation Flashpoint: Dragon Rising 오퍼레이션 플래시포인트: 드래곤 라이징 | PS3 | 01.01 | Original | | BLKS 20157 |  |
 | Odyssey (Disc 1) 奧德賽 | PC | | Original | | |  |
 | Odyssey (Disc 2) 奧德賽 | PC | | Original | | |  |
 | Olympiad Qiaosai 2 奧林匹亞橋賽2 | PC | | Original | | |  |
 | Oscar the Balloonist: Discovers the Farm 小小探險家奧斯卡 農場奇遇記 | PC | | Original | | |  |