Our Breeding Series – My Beetle (J)(Eurasia)

Oddworld – Munch’s Oddysee (U)(Rising Sun)

Onimusha Tactics (J)(Eurasia)

Ochaken No Heya (J)(Rising Sun)

One Piece – Going Baseball Haejeok Yaku (K)(Independent)

Okaitoku Series 5 – Puzzle & Tantei Collection (J)(Patience)

Oshare Princess EX Primo Debut Monogatari & Renai Uranai Daisakusen (J)(Caravan)

Okuman Chouja Game (J)(Independent)

Ougon no Taiyou – Shitsu Warate Jidai (J)(Eurasia)

One Piece – Mezase! King of Paris (J)(Cezar)

Ochainu no Bouken Jima (J)(sUppLeX)

Ottifanten Pinball (G)(Rising Sun)

Oriental Blue – Ao no Tengai (J)(Cezar)

Over the Hedge – Beesten Bij de Buren (N)(Independent)

Oshare Princess 5 (J)(Supplex)

Oddworld – Munch’s Oddysee (G)(Rising Sun)

Onmyou Taisenki Zeroshiki (J)(Caravan)

Oshaberi Inco Club (J)(Chakky)

Oshare Princess 2 And Doubutsu Kyaranabi (J)(Mugs)

Ojaru Maru – Tsuki Hikari Machi Tour de Ojaru (J)(Trashman)