Orbeats
Orbitum
Orbtriak
Orchestrate
Origami Angel: Feeling Not Found
Orzmic
Osawari Tantei Ozawa Rina: Nameko Rhythm
O Seresteiro
Oshare Majo Love and Berry: Cute ni Oshare
Oshare Majo: Love and Berry DS Collection
Osu!
Osu!Droid
Osu!Octave
Osu!Stream
Osu! Tatakae! Ouendan
Otoca D'or
Otocky
Otome ga Kanaderu Koi no Aria
Otome ga Kanaderu Koi no Aria: Kimi ni Sasageru Encore
Otoranger
Otoshuu DX
Otto’s Galactic Groove!!
Outlaw Heart
Overpass