Ohanaya-san ni narou! (J)(kaMX)
Ojaru Maru - Tsuki Hikari Machi Tour de Ojaru (J)(Trashman)
Okaitoku Series 5 - Puzzle & Tantei Collection (J)(Patience)
Okuman Chouja Game (J)(Independent)
One Piece - Mezase! King of Paris (J)(Cezar)
One Piece - Nanatsu Shima no Daihihou (J)(Cezar)
One Piece Dragon Dream (J)(Caravan)
One Piece Going Baseball (J)(Eurasia)
Onimusha Tactics (E)(Patience)
Onimusha Tactics (J)(Eurasia)
Onimusha Tactics (U)(Mode7)
Onmyou Taisenki Zeroshiki (J)(Caravan)
Open Season (U)(Rising Sun)
Open Season (E)(Sir VG)
Operation Armored Liberty (U)(Rising Sun)
Oriental Blue - Ao no Tengai (J)(Cezar)
Oshaberi Inco Club (J)(Chakky)
Oshare Princess (J)(Chakky)
Oshare Princess 2 And Doubutsu Kyaranabi (J)(Mugs)
Oshare Princess 3 (J)(Rising Sun)
Oshare Princess 5 (J)(Supplex)
Oshare Princess EX Primo Debut Monogatari & Renai Uranai Daisakusen (J)(Caravan)
Oshare Wanko (J)(Supplex)
Ottifanten Pinball (G)(Rising Sun)
Ougon no Taiyo (J)(Eurasia)
Our Breeding Series - My Ameba (J)(Eurasia)
Our Breeding Series - My Beetle (J)(Eurasia)
Over the Hedge (U)(Trashman)
Over the Hedge (E)(Independent)
Over the Hedge - Beesten Bij de Buren (N)(Independent)
