All known Xbox games
1,231 games from Wikipedia, Wikidata, MobyGames and players' collections. Most are basic entries that list facts from public sources.
Games
- Oblivion Lost
- ObsCure2004
- ObsCure II2008
- Oddworld: Munch's Oddysee2001
- Oddworld: Stranger's Wrath2005
- Open Season2006
- OpenSpace
- Operation Flashpoint
- Operation Flashpoint: Cold War Crisis2001
- Operation Flashpoint: Elite2005
- Otogi
- Otogi 2: Immortal Warriors2003
- Otogi: Myth of Demons2002
- Outlaw Golf2002
- Outlaw Golf 22004
- Outlaw Tennis2005
- Outlaw Volleyball2003
- OutRun
- OutRun 22003
- OutRun 2006: Coast 2 Coast2006
- Over the Hedge2006
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