Region | Title | System | Version | Edition | Languages | Serial | Status |
 | 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 |  |
 | OASYS/Win V2.0 | FMT | | Original | | B28C7020 |  |
 | Obbligato (Taikenban CD-ROM) オブリガート 体験版CD-ROM | PC | | Demo | | |  |
 | Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition | | |  |
 | Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | |  |
 | 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 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 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 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 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) |
 | Oceans Below オーシャンズ・ビロウ | MAC | | Original | | MSC001 |  |
 | Oceans Below オーシャンズ・ビロウ | 3DO | | Original | | FZ-SJ2752 |  |
 | Ocha no Ma Battle お茶の間バトル | PSX | | Bundled with Controller | | SLPM 86681 |  |
 | 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) |
 | Odama 大玉 | GC | Rev 1 | Bundled with Microphone | | DL-DOL-GOOJ-JPN |  |
 | 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) |
 | Odo Odo Oddity おどおどおっでぃ | PSX | | Original | | SLPS-00754 |  |
 | 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) |
 | Ogura Hyakunin Isshu 小倉百人一首 | 3DO | | Original | | SV-0201 |  |
 | Oh No! オーノー! | PSX | | Original | | SLPS-02764 |  |
 | Oh-chan no Oekaki Logic おーちゃんのお絵かきロジック | PSX | | Original, SunColle Best, Value 1500 | | SLPS 00093 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oh-chan no Oekaki Logic おーちゃんのお絵かきロジック | SS | 1.005 | Original | | T-1508G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oh-chan no Oekaki Logic 2 おーちゃんのお絵かきロジック2 | PSX | Rev 1 | SunColle Best, Value 1500 | | SLPS 02145 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oh-chan no Oekaki Logic 3 おーちゃんのお絵かきロジック3 | PSX | | Value 1500 | | SLPS 03134 |  |
 | Oh! Bakyuuun オーバキューン | PSX | | Original | | SLPS 02680 |  |
 | Oha-Studio 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 |  |
 | 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 |  |
 | Öhlins Hyper-Rally ハイパーラリー | PSX | | Original | | SLPS 00462 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Ojousama Express お嬢様特急 | PSX | | Taikenban | | SLPM 80255 |  |
 | Ojousama Express (Disc 1) お嬢様特急 | PSX | | Original | | SLPS 01495 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ojousama Express (Disc 1) お嬢様特急 | SS | 1.005 | Original | | T-27803G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ojousama Express (Disc 2) お嬢様特急 | PSX | | Original | | SLPS 01496 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ojousama Express (Disc 2) お嬢様特急 | SS | 1.005 | Original | | T-27803G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ojousama Kumikyoku: Sweet Concert お嬢様組曲 ~Sweet Concert~ | PS2 | 1.01 | Special Pack Ban | | SLPM 66726 |  |
 | Ojousama o Nerae!! お嬢様を狙え!! | SS | 1.002 | Original | | T-38101G | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ojousama o Nerae!! お嬢様を狙え!! | SS | 1.003 | Original | | T-38101G |  |
 | Ojousama Sousamou お嬢様捜査網 | PC-FX | | Original | | FXNHE616 |  |
 | Okappari-ou 陸釣王 | PSX | | Original | | SLPS 01524 |  |
 | 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 |  |
 | Olympia, Takasago: Virtua Pachi-Slot III オリンピア・高砂 バーチャ・パチスロⅢ | PSX | | Original | | SLPS 01386 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Olympia, Yamasa: Virtua Pachi-Slot II: Jissen! Bishoujo Kouryakuhou オリンピア・山佐 バーチャパチスロⅡ ~実戦!美少女攻略法~ | PSX | | Original | | SLPS 00714 |  |
 | Olympic Soccer オリンピックサッカー | PSX | | Original | | SLPS 00523 |  |
 | Olympic Soccer オリンピックサッカー | SS | 1.002 | Original | | T-7304G |  |
 | Omakase! Savers おまかせ!退魔業 | SS | 1.002 | Original | | GS-9030 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Omega Boost オメガ・ブースト | PSX | | Original, Preview | | SCPS 10020 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Omega Boost オメガ・ブースト | PSX | | Taikenban | | PAPX 90080 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Omizu no Hanamichi お水の花道 | PSX | | Original | | SLPS-02815 |  |
 | Omoi no Kakera: Close to 想いのかけら ‐Close to‐ | PS2 | 1.02 | 2800 Collection | | SLPM 66385 |  |
 | 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 ワン | PSX | | Original | | SLPS 01812 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece Mansion ワンピースマンション | PSX | | Taikenban | | SLPM 80617 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece Mansion ワンピースマンション | PSX | | Original | | SLPM 86837 | ![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 |  |
 | 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 |  |
 | One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Multi Tap (SCPH-70120) Doukonban | | SLPS 25584 |  |
 | One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Original | | SLPS 25576 |  |
 | One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Multi Tap (SCPH-10090) Doukonban | | SLPS 25583 |  |
 | 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: Round the Land! 원피스 라운드 더 랜드! | PS2 | 1.00 | Original | | SLKA 25208 |  |
 | One Two Smash: Tanoshii Tennis ワン・ツー スマッシュ たのしいテニス | PSX | | Honkakuha de 1300 | | SLPS-02585 |  |
 | 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 |  |
 | 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 |  |
 | Onegai Countdown おねがいカウントダウン | PC | | Original | | YMH-0013 |  |
 | Ongaku Tkool 3 音楽ツクール3 | PSX | | Original | | SLPS-03161 |  |
 | 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) |
 | Oni 奥妮 | PC | 1.7 | Original | | |  |
 | Oni ONi 完全日本語版 for Windows | PC | 1.00.000 | Original | | MTW-0390 |  |
 | 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 |  |
 | Onimusha 鬼武者 | PS2 | 1.01 | Taikenban | | SLPM 61001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 鬼武者 | PS2 | 1.03 | Original, Mega Hits! | | SLPM 65010 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 2 鬼武者2 | PS2 | 1.04 | Shokai Press-ban | | SLPM 65100 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 2 鬼武者2 | PS2 | 1.04 | Original, Mega Hits! | | SLPM 65101 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 3 鬼武者3 | PS2 | 1.01 | Original | | SLPM 65413 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha Buraiden 鬼武者 無頼伝 | PS2 | 1.02 | Original | | SLPM 65411 |  |
 | Onimusha: Warlords | PS2 | 1.00 | Original | | SLPM 67507 |  |
 | 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 You: Rebel Cross Only You リベルクルス | PS2 | 1.03 | Original, Drama CD Tsuki | | SLPS 25150 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Only You: Seikimatsu no Juliet-tachi Only You ~世紀末のジュリエットたち~ | FMT | | Shokai Gentei | | |  |
 | Onmyou Taisenki: Byakko Enbu 陰陽大戦記 白虎演舞 | PS2 | 1.01 | Original | | SLPS-20417 |  |
 | Onmyou Taisenki: Byakko Enbu 陰陽大戦記 白虎演舞 | PS2 | 1.01 | EyeToy Camera Doukonban | | SLPS 20416 |  |
 | Onmyou Taisenki: Hasha no In 陰陽大戦記 ~覇者の印~ | PS2 | 1.03 | Original | | SLPS 25501 |  |
 | Onore no Shinzuru Michi wo Yuke 己の信ずる道を征け | PSP | 1.01 | Original | | ULJM-05465 |  |
 | Ooedo Huusui 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 Funtou-ki: 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 | | HDR-0057 |  |
 | Oogami Ichirou Funtou-ki: 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 | | HDR-0057 |  |
 | Ookami 大神 | PS2 | 1.03 | Original, PlayStation 2 the Best | | SLPM 66375 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ookami Kakushi おおかみかくし | PSP | 1.04 | Original | | ULJM 05413 | ![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 | | | | |  |
 | The Open Golf: History of Turnberry ジ・オープンゴルフ History of Turnberry | PSX | | Original | | SLPS-00418 |  |
 | Operation Wolf オペレーション・ウルフ | FMT | 1.00 | Ving Vol. 3 | | HMB-126 |  |
 | 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) |
 | Option: Tuning Car Battle オプション チューニングカーバトル | PSX | | Original | | SLPS 01207 |  |
 | 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 |  |
 | Option: Tuning Car Battle 2 オプション チューニングカーバトル2 | PSX | | Original | | SLPS-01857 |  |
 | Option: Tuning Car Battle Spec R オプション チューニングカーバトル スペックR | PSX | | Original | | SLPS-02587 |  |
 | Oracle no Houseki: Jewels of the Oracle オラクルの宝石 Jewels of the Oracle | PSX | | Original | | SLPS-00240 |  |
 | Oracle no Houseki: Jewels of the Oracle オラクルの宝石 | SS | 1.004 | Original | | T-1511G |  |
 | The Orange Box (Disc 1) 戰慄時空2:二部曲重裝旗艦版 | PC | | Original | | TTE0193 |  |
 | The Orange Box (Disc 2) 戰慄時空2:二部曲重裝旗艦版 | PC | | Original | | TTE0193 |  |
 | Orange Honey: Boku wa Kimi ni Koi Shiteru オレンジハニー 僕はキミに恋してる | PS2 | 1.02 | Original, Best Collection | | SLPS 25767 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Orange Honey: Boku wa Kimi ni Koi Shiteru オレンジハニー ~ 僕はキミに恋してる~ | PS2 | 1.02 | Shokai Genteiban | | SLPS 25766 |  |
 | Orange Pocket: Cornet オレンジポケット -コルネット- | DC | 1.004 | Shokai Genteiban | | T-18707M |  |
 | Orange Pocket: Root オレンジポケット ~リュート~ | PS2 | 1.02 | Shokai Genteiban | | SLPM 65524 |  |
 | Orange Pocket: Root オレンジポケット ~リュート~ | PS2 | 1.02 | Original | | SLPM 65525 |  |
 | 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 Maker EX: Imouto to Koishiyo Portable 俺の妹めいかあEX いもうとと恋しよっ ぽ~たぶる | PSP | 1.01 | Original | | ULJS-00357 |  |
 | Ore no Ryouri 俺の料理 | PSX | | Original, PlayStation the Best | | SCPS 10099 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ore no Shikabane o Koete Yuke 俺の屍を越えてゆけ | PSX | | Original, PlayStation the Best, PSone Books | | SCPS 10074 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ore no Yotto: Ganbare! Nippon Challenge 俺のヨット ~がんばれ! ニッポン・チャレンジ~ | PSX | | Original | | SLPS 02132 |  |
 | Ore! Tomba オレっ!トンバ | PSX | | Taikenban | | SLPM 80165 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ore! Tomba オレっ!トンバ | PSX | | Original | | SLPS 01144 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | Oretachi Geesen Zoku: Nekketsu Kouha Kunio-kun オレたちゲーセン族 ~熱血硬派くにおくん~ | PS2 | 1.01 | Original | | SLPM 62706 |  |
 | 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: Pooyan オレたちゲーセン族 プーヤン | PS2 | 1.01 | Original | | SLPM-62731 |  |
 | Oretachi Geesen Zoku: Super Volleyball オレたちゲーセン族 スーパーバレーボール | PS2 | 1.04 | Original | | SLPM-62660 |  |
 | 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 |  |
 | Oretachi Geesen Zoku: Time Pilot オレたちゲーセン族 その4 タイムパイロット | PS2 | 1.01 | Original | | SLPM 62644 |  |
 | 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 |  |
 | Original War (Disc 1) (Install Disc) オリジナル ウォー | PC | 1.02 | Original | | |  |
 | Original War (Disc 2) (GameDisc) オリジナル ウォー | PC | 1.02 | Original | | |  |
 | Osaka Naniwa Matenrou 大阪ナニワ摩天楼 | PSX | | Original | | SLPS 02013 |  |
 | Osananajimi wa Pet Yakuza! 幼なじみはペットヤクザ!体験版 | PC | | Taikenban | | |  |
 | Oscar the Balloonist: Discovers the Farm 小小探險家奧斯卡 農場奇遇記 | PC | | Original | | |  |
 | Oshare Cooking II おしゃれクッキングⅡ | FMT | Rev B | Original | | HMA-267B |  |
 | Oshiete! Popotan おしえて! ぽぽたん | PS2 | 1.02 | Original | | SLPM 65535 |  |
 | Oshigoto-shiki Jinsei Game: Mezase Shokugyou King お仕事式人生・ゲーム めざせ職業・王 | PSX | | Original, The Best Takaramono | | SLPM 87316 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otenki Kororin お天気ころりん | PSX | | Original | | SLPM 87047 |  |
 | 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 | | 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 |  |
 | 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 | FMT | | Original | | HMB-170 |  |
 | Otogi O・TO・GI ~御伽~ | XBOX | | Original | | FS-002 |  |
 | Otogi 오토기 | XBOX | | Original | | YB-002 |  |
 | Otogi Story: Tenshi no Shippo おとぎストーリー ~天使のしっぽ~ | PSX | | Original | | SLPS 03531 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otogi: Hyakki Toubatsu Emaki O・TO・GI ~百鬼討伐絵巻~ | XBOX | | Special Pack | | FS-004 |  |
 | Otogi: Myth of Demons | XBOX | | Special Pack | | FS-002 |  |
 | Otome Koigokoro Prister 乙女恋心プリスター体験版 | PC | | Taikenban | | |  |
 | Otome no Jijou 乙女の事情 | PS2 | 1.01 | Original | | SLPM 66508 |  |
 | 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 |  |
 | Otona no Asobi おとなの遊び | PSX | | Nichibutsu Collection 2000 | | SLPS 02459 |  |
 | Otostaz オトスタツ | PS2 | 1.00 | Original | | SCPS 11024 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90228 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90226 |  |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | SCPS 11020 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz 오토스타츠 | PS2 | 1.01 | Original | | SCPS 56004 |  |
 | 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 Yuusha 王道勇者 | PC | | Original | | ALS-0029 |  |
 | Ougon Kishi Garo 黄金騎士 牙狼 | PS2 | 1.01 | Genteiban | | SLPS 20462 |  |
 | Ougon Kishi Garo 黄金騎士 牙狼 | PS2 | 1.01 | Original | | SLPS 20463 |  |
 | Oujisama Lv1 王子さまLv1 | PSX | | Original | | SLPS-03412 |  |
 | Oujisama Lv1.5: Oujisama no Tamago 王子さまLv1.5 ~王子さまのたまご~ | PSX | | Original | | SLPS 03534 |  |
 | Ouka Houshin: Ouka Sakishi Toki 央華封神 ~央華咲きし刻~ | DC | 1.003 | Original | | T-38704M |  |
 | 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) |
 | Oukyuu no Hihou Tension 王宮の秘宝 テンション | PSX | | Original, VAP Best Thanks 1800 | | SLPS 00438 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oumagatoki 逢魔が時 | PSX | | Original, PSone Books | | SLPS 03235 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oumagatoki 逢魔が時 プレミアム“FAN”ディスク | PSX | | Premium Fan Disc | | SLPM 80623 |  |
 | Oumagatoki 2 逢魔が時2 | PSX | | Original | | SLPS-03272 |  |
 | 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 |  |
 | Ouran Koukou Host Club 桜蘭高校ホスト部 | PS2 | 1.01 | Genteiban | | SLPM 66737 |  |
 | Ousama Game (Disc 1) (Ichigo Disc) 王様げーむ | SS | 1.001 | Original | | T-21904G |  |
 | Ousama Game (Disc 2) (Momo Disc) 王様げーむ | SS | 1.001 | Original | | T-21904G |  |
 | Out Live: Be Eliminate Yesterday アウトライブ Be Eliminate Yesterday | PSX | | Original | | SLPS-00746 |  |
 | Outer World アウター・ワールド | 3DO | | Original | | FZ-SJ3451 |  |
 | Outlaw Golf アウトローゴルフ | XBOX | | World Collection | | VU-016 |  |
 | Outlaw Volleyball アウトローバレーボール | XBOX | | World Collection | | SS-003 |  |
 | Outlaw Volleyball 아웃로 발리볼 | XBOX | | Original | | SS-003 |  |
 | OutRun 2 アウトラン2 | XBOX | | Shokai Genteiban | | SE-054 |  |
 | 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 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OutRun 2006: Coast 2 Coast | PC | | Gamer's Choice | | THQ70690 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |
 | 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 |  |
 | 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 | | 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 |  |
 | 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) |
 | Oyaji Hunter Mahjong おやじハンター・マージャン | 3DO | | Original | | IMP-SF0703 |  |
 | 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 Entertainment Series: TV Kamishibai Vol. 1 親子エンタテインメントシリーズ ~てれび紙芝居Vol.1~ | PSX | | Original | | SLPM 86393 |  |
 | Oz OZ -オズ- | PS2 | 1.02 | Original, Konami the Best | | SLPM 66033 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | 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 |  |