O (24 JOGOS)

  1. Ochaken No Heya
  3. Ohanaya-san Monogatari
  5. Okuman Chouja Game
  7. Our Breeding Series
  9. Ozzy & Drix #PROPER#
  11. Oshare Wanko
  13. Oshare Princess
  15. Ougon no Taiyo
  17. Oshare Princess 3
  19. Ougon no Taiyou - Shitsu
  21. Oshare Princess 2 And Doubu
  23. Operation Armored Liberty
  25. Ougon no Taiyou - Shitsu
  27. Oshaberi Inco Club
  29. Onimusha Tactics
  31. Onimusha Tactics (hack)
  33. One Piece - Going Basebal
  35. One Piece - Nanatsu Shima
  37. Oriental Blue - Ao no Tenga
  39. One Piece - Mezase! King
  41. Ojaru Maru - Tsuki Hikari
  43. Okaitoku Series 5 - Puzzle
  45. O Hana Okusan Ninarou
  47. Oddworld - Munch's Oddysee