All known Dreamcast games
782 games from Wikipedia, Wikidata, MobyGames and players' collections. Most are basic entries that list facts from public sources.
Games
- O.to.i.Re: Dreamcast Sequencer1999
- Ōgami Ichirō Funtō-ki: Sakura Taisen Kayō Shō "Kurenai Tokage" yori2000
- Ogami Ichiro Funtouki: Sakura Taisen Kayou Show "Benitokage" Yori2000
- Okaeri! Yuunagi-iro no Koi Monogatari2001
- Omoide ni Kawaru Kimi: Memories Off2002
- Ooga Booga2001
- OpenSpace
- Orange Pocket2003
- Orange Pocket: Cornet2004
- Orion's Puzzle Collection
- Outtrigger2001
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