O.M.G. 26 - Our Mini Games (U)(XenoPhobia)
Obunsha Deru-jun - Koumin DS (J)(6rz)
Obunsha Deru-jun - Sansuu DS (J)(6rz)
Obunsha Deru-jun Chiri DS (J)(Independent)
Obunsha Deru-jun Kokugo DS (J)(Independent)
Ochainu no Daibouken (J)(6rz)
Ochaken no Daibouken 2 - Yume Ippai no Omochabako (J)(EXiMiUS)
Ochaken no Heya DS (J)(WRG)
Ochaken no Heya DS 2 (J)(WRG)
Ochaken no Heya DS 2 (v01) (JP)(High Road)
Ochaken no Heya DS 3 (J)(Independent)
Ochaken no Heya DS 3 (v01) (JP)(High Road)
Ochaken no Heya DS 4 - Ochaken Land de Hotto Shiyo (JP)(Caravan)
Odenkun - Tanoshii Oden Mura (J)(Caravan)
Odoru Daisousasen The Game - Sensuikan ni Sennyuu Seyo! (J)
Oekaki Puzzle Battle Vol.1 - Yuusha-Oh GaoGaiGar Version (J)(Mode 7)
Ohimesama Debut (J)(Independent)
Oide yo Doubutsu no Mori (v01) (J)(GRN)
Oide yo Doubutsu no Mori (J)(Independent)
Oishiku Kiwameru Shokutsuu DS - Otona no Shuumatsu (J)(Navarac)
Oishinbo - DS Recipe Shuu (J)(2CH)
Ojaru-Maru DS - Ojaru to Okeiko Aiueo (J)(6rz)
OK! Puzzle Stars (Trimmed 63 Mbit) (E)
Okada Toshio no Itsumademo DEBU to Omounayo - DS Recording Diet (J)(Caravan)
Okaeri! Chibi-Robo! Happy Rich Oosouji (JP)(High Road)
Okamiden (U)
Okamiden (E)
Okamiden - Chisaki Taiyou (J)
Oktoberfest - The Official Game (EU)(M5)(Independent)
One Piece - Gear Spirit (J)(Caravan)
