O

• Ochaken Kururin - Honwaka Puzzle de Hotto Shiyo (Japan)
• Ochaken no Bouken Jima - Honwaka Yume no Island (Japan)
• Ochaken no Heya (Japan)
• Ochaken no Yumebouken (Japan)
• Oddworld - Munch's Oddysee (Germany)
• Oddworld - Munch's Oddysee (USA, Europe)
• Ohanaya-san Monogatari GBA - Iyashikei Ohanaya-san Ikusei Game (Japan)
• Ojarumaru - Gekkouchou Sanpo de Ojaru (Japan)
• Okumanchouja Game - Nottori Daisakusen! (Japan)
• One Piece (USA)
• One Piece - Dragon Dream (Japan)
• One Piece - Going Baseball - Haejeok Yaku (Korea)
• One Piece - Going Baseball - Kaizoku Yakyuu (Japan)
• One Piece - Ilgop Seomui Debomool (Korea)
• Onimusha Tactics (Europe)
• Onimusha Tactics (Japan)
• Onimusha Tactics (USA)
• Onmyou Taisenki Zeroshiki (Japan)
• Open Season (Europe) (En,Fr,De,Es,It,Sv,No,Da,Fi)
• Open Season (Europe) (En,Fr,Es,Nl)
• Open Season (USA) (En,Fr,Es)
• Operation Armored Liberty (USA)
• Oriental Blue - Ao no Tengai (Japan)
• Oshaberi Inko Club (Japan)
• Oshare Princess (Japan)
• Oshare Princess 2 (Japan)
• Oshare Princess 3 (Japan)
• Oshare Princess 5 (Japan)
• Oshare Wanko (Japan)
• Ottifanten Pinball (Germany)
• Ougon no Taiyou - Hirakareshi Fuuin (Japan)
• Ougon no Taiyou - Ushinawareshi Toki (Japan)
• Over the Hedge (Europe)
• Over the Hedge (USA)
• Over the Hedge - Beesten bij de Buren (Netherlands)
• Over the Hedge - Hammy Goes Nuts! (Europe) (En,Fr,De,Es,It,Nl)
• Over the Hedge - Hammy Goes Nuts! (USA)
• Ozzy & Drix (USA)