This is an index of Microsoft Windows games.
This list has been split into multiple pages. Please use the Table of Contents to browse it.
TitleReleasedDeveloperPublisherO.D.T.1998PsygnosisPsygnosisO.R.B: Off-World Resource Base2002Strategy FirstStrategy First, MindscapeOasis2005Mind Control SoftwarePlayFirstObscure2004Hydravision EntertainmentDreamCatcher InteractiveObscure II2008Hydravision EntertainmentPlaylogic EntertainmentObservation2019No CodeDevolver DigitalObserver2017Bloober TeamAspyrObsidian1996Rocket Science GamesSegaSoftThe Occupation2019White Paper GamesHumble BundleOceanhorn: Monster of Uncharted Seas2015Cornfox & Bros.FDG EntertainmentOceanhorn 2: Knights of the Lost Realm2017Cornfox & Bros.FDG EntertainmentOctogeddon2018All Yes GoodAll Yes GoodOddworld: Abe's Exoddus1998Oddworld InhabitantsGT InteractiveOddworld: Abe's Oddysee1997Oddworld InhabitantsGT InteractiveOddworld: New 'n' Tasty!2015Just Add WaterOddworld InhabitantsOdyssey: The Search for Ulysses2000Cryo InteractiveCryo InteractiveOf Orcs and Men2012Cyanide, SpidersFocus Home InteractiveOff-Road Redneck Racing2001Rage SoftwareInterplay EntertainmentOffworld Trading Company2016Mohawk GamesStardockOil Rush2012UNIGINE CompanyUNIGINE Company, Iceberg InteractiveOld World2021Mohawk GamesHooded HorseThe Omega Stone2003Omni CreativeDreamCatcher InteractiveOne Must Fall: Battlegrounds2003Diversions EntertainmentDiversions PublishingOne Piece: Pirate Warriors 32015Omega ForceBandai Namco EntertainmentOne Piece: Burning Blood2016Spike ChunsoftBandai Namco EntertainmentOnEscapee1997Invictus Games, Ltd.Sadeness SoftwareOnimusha 3: Demon Siege2004CapcomCapcomOnimusha: Warlords2001CapcomCapcomOnly Up!2023SCKR GamesSCKR GamesOolite2006Giles WilliamsOpen Roads2024Open Roads TeamAnnapurna InteractiveOpenArena2005OpenArena teamOperation Blockade2002Screaming GamesInfogramesOperation Flashpoint: Cold War Crisis2001Bohemia Interactive StudioCodemastersOperation Flashpoint: Dragon Rising2009CodemastersCodemastersOperation Neptune1995The Learning CompanyThe Learning CompanyOperation Sanctuary2003AugustAugustOperation: Matriarchy2005MADIA EntertainmentBuka EntertainmentThe Operative: No One Lives Forever2000Monolith ProductionsFox InteractiveOpsys2000Lemon Interactive[hyper]media limitedThe Orange Box2007ValveValveOrbiter2000Martin SchweigerOrcs Must Die!2011Robot EntertainmentRobot EntertainmentOrder of Battle: Pacific2015The ArtistocratsSlitherine SoftwareOrder of War2009WargamingSquare EnixThe Oregon Trail1996MECCBroderbundOregon Trail II1995MECCSoftkeyThe Oregon Trail 3rd Edition1997MECCMECCThe Oregon Trail 4th Edition2001MECCThe Learning CompanyOri and the Blind Forest2015Moon StudiosMicrosoft StudiosOriginal War2001Altar InteractiveVirgin InteractiveOrion: Prelude2014Spiral Game StudiosSpiral Game StudiosOrly's Draw-A-Story1997ToeJam & Earl ProductionsBroderbundOsiris: New Dawn2023Fenix Fire EntertainmentFenix Fire EntertainmentOsmos2009Hemisphere GamesHemisphere GamesOthercide2020Lightbulb CrewFocus Home InteractiveOtto Matic2001Pangea SoftwareAspyr MediaOut of the Park Baseball2008OOTP DevelopmentsOOTP DevelopmentsOutcast1999AppealInfogramesOutcast: A New Beginning2024Appeal StudiosTHQ NordicOuter Wilds2019Mobius DigitalAnnapurna InteractiveThe Outer Worlds2019Obsidian EntertainmentPrivate DivisionThe Outforce2000O3 GamesPan Interactive, Strategy FirstOutlast2013Red BarrelsRed BarrelsOutlast 22017Red BarrelsRed BarrelsThe Outlast Trials2024Red BarrelsRed BarrelsOutlaw Golf2002HypnotixGlobal Star SoftwareOutlaws1997LucasArtsLucasArtsOutlive2000Continuum EntertainmentContinuum Entertainment, Take-Two InteractiveOutpost 2: Divided Destiny1997DynamixSierra On-LineOutpost Kaloki2004NinjaBeeMicrosoft Game StudiosOutriders2021People Can FlySquare EnixOutRun 2006: Coast 2 Coast2006Sumo DigitalSegaOutward2019Nine DotsDeep SilverOutwars1998SingleTracMicrosoftOver the Hedge2006Edge of RealityActivisionOverboard!1997PsygnosisPsygnosisOverclocked: A History of Violence2008House of TalesLighthouse InteractiveOvercooked2016Ghost Town GamesTeam17Overload2018Revival ProductionsRevival ProductionsOverlord2007Triumph StudiosCodemastersOverlord II2009Triumph StudiosCodemastersOverlord: Fellowship of Evil2015Triumph StudiosCodemastersOverlord: Raising Hell2008Triumph StudiosCodemastersOverwatch2016Blizzard EntertainmentBlizzard EntertainmentOverwatch 22023Blizzard EntertainmentBlizzard Entertainment