| Title |
Year |
Genre |
| Ochaken Kururin ~ Honwaka Puzzle de Ho~ttoshiyou? |
2004 |
Puzzle |
| Ochaken no Bouken Jima - Honwaka Yume no Island |
2005 |
Platform |
| Ochaken no Heya |
2003 |
Breeding |
| Ochaken no Yume Bouken |
2005 |
Platform |
| Oddworld - Munch's Oddysee |
2003 |
Action |
| Ohanaya-san Monogatari GBA |
2002 |
Adventure |
| Ojarumaru - Gekkou Machi Sanpo de Ojaru |
2003 |
Platform |
| Okaitoku Series 5 - Puzzle & Tantei Collection |
2003 |
Compilation |
| Okuman Chouja Game - Nottori Daisakusen! |
2001 |
Board game |
| One Piece - Dragon Dream! |
2005 |
Action |
| One Piece - Going Baseball - Haejeok Yagu |
2005 |
Baseball |
| One Piece - Going Baseball - Kaizoku Yakyuu |
2004 |
Baseball |
| One Piece - Ilgop Seomui Daebomul |
2004 |
RPG |
| One Piece |
2005 |
Action |
| Onimusha Tactics |
2003 |
RPG |
| Onmyou Taisenki - Zeroshiki |
2004 |
RPG |
| Open Season |
2006 |
Platform |
| Operation Armored Liberty |
2003 |
Action |
| Oriental Blue - Ao no Tengai |
2003 |
RPG |
| Oshaberi Inko Club |
2002 |
Adventure |
| Oshare Princess |
2002 |
Board game |
| Oshare Princess 2 + Doubutsu Kyaranabi Uranai |
2002 |
Compilation |
| Oshare Princess 3 |
2003 |
Compilation |
| Oshare Princess 5 |
2005 |
Compilation |
| Oshare Wanko |
2004 |
Breeding |
| Ottifanten Pinball |
2005 |
Pinball |
| Ougon no Taiyou - Hirakareshi Fuuin |
2001 |
RPG |
| Ougon no Taiyou - Ushinawareshi Toki |
2002 |
RPG |
| Oui-Oui - Une Journée au Pays des Jouets |
2006 |
Platform |
| Over the Hedge - Beesten bij de Buren |
2006 |
Arcade |
| Over the Hedge - Hammy Goes Nuts |
2006 |
Golf |
| Over the Hedge |
2006 |
Arcade |
| Overstorm |
???? |
Platform |
| Ozzy & Drix |
2003 |
Action |
