One Piece Gigant Battle 2 – Shin Sekai (Japan)

One Piece – Gigant Battle! (Europe)

One Piece – Gear Spirit (Korea)

Ouran Koukou Host Club DS (Japan)

Open Season (Europe) (En,Fr,De,Es,It,Sv,No,Da,Fi)

One Piece – Gear Spirit (Japan)

Oshare Majo Love and Berry – DS Collection (Japan)

OMG 26 – Our Mini Games (USA)

Over the Hedge (USA)

Okaeri! Chibi-Robo! – Happy Rich Oosouji! (Japan)

Orcs & Elves (USA) (En,Fr,De,Es,It)

One Piece – Gigant Battle! (Japan)

Oshaberi Oumu (Japan)

Open Season (USA) (En,Fr,Es,Nl)

Original Frisbee Disc Sports – Ultimate & Golf (Europe) (En,Fr,De,Es,It)

Ochaken no Heya DS 2 (Japan)

Oide yo Doubutsu no Mori (Japan) (Rev 1)

Osu! Tatakae! Ouendan (Japan)

Our House (USA)

Ochaken no Daibouken – Honwaka Yumemiru Sekai Ryokou (Japan)

Ookami Den (Europe)

Otogi Juushi Akazukin (Japan)

Obunsha Deru-jun – Chiri DS (Japan) (Rev 1)

Oishinbo – DS Recipe Shuu (Japan)