Index of Windows games (O)

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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.

TitleReleasedDeveloperPublisher
O.D.T. 1998 Psygnosis Psygnosis
O.R.B: Off-World Resource Base 2002 Strategy First Strategy First, Mindscape
Oasis 2005 Mind Control Software PlayFirst
Obscure 2004Hydravision Entertainment DreamCatcher Interactive
Obscure II 2008Hydravision Entertainment Playlogic Entertainment
Obsidian 1996 Rocket Science Games SegaSoft
Oceanhorn: Monster of Uncharted Seas 2015Cornfox & Bros.FDG Entertainment
Oceanhorn 2: Knights of the Lost Realm 2017Cornfox & Bros.FDG Entertainment
Octogeddon 2018All Yes GoodAll Yes Good
Oddworld: Abe's Exoddus 1998 Oddworld Inhabitants GT Interactive
Oddworld: Abe's Oddysee 1997 Oddworld Inhabitants GT Interactive
Oddworld: New 'n' Tasty! 2015 Just Add Water Oddworld Inhabitants
Odyssey: The Search for Ulysses 2000 Cryo Interactive Cryo Interactive
Off-Road Redneck Racing 2001 Rage Software Interplay Entertainment
Oh No! More Lemmings 1995 DMA Design Psygnosis
The Omega Stone 2003 Omni Creative DreamCatcher Interactive
One Must Fall: Battlegrounds 2003 Diversions Entertainment Diversions Publishing
One Piece: Pirate Warriors 3 2015 Omega Force Bandai Namco Entertainment
One Piece: Burning Blood 2016 Spike Chunsoft Bandai Namco Entertainment
OnEscapee 1997 Invictus Games, Ltd. Sadeness Software
Onimusha 3: Demon Siege 2004 Capcom Capcom
Onimusha: Warlords 2001 Capcom Capcom
Only Up! 2023SCKR GamesSCKR Games
Oolite 2006 Giles Williams
OpenArena 2005 OpenArena team
Operation Flashpoint: Cold War Crisis 2001 Bohemia Interactive Studio Codemasters
Operation Flashpoint: Dragon Rising 2009 Codemasters Codemasters
Operation Blockade 2002 Screaming Games Infogrames
Operation: Matriarchy 2005 MADIA Entertainment Buka Entertainment
Operation Neptune 1995 The Learning Company The Learning Company
The Operative: No One Lives Forever 2000 Monolith Productions Fox Interactive
The Orange Box 2007 Valve Valve
Orcs Must Die! 2011 Robot Entertainment
Orbiter (simulator) 2000 Martin Schweiger
Order of Battle: Pacific 2015The Artistocrats Slitherine Software
Order of War 2009 Wargaming Square Enix
The Oregon Trail 1996 MECC Brøderbund
Oregon Trail II 1995 MECC Softkey
The Oregon Trail 3rd Edition 1997 MECC MECC
The Oregon Trail 4th Edition 2001 MECC The Learning Company
Ori and the Blind Forest 2015 Moon Studios Microsoft Studios
Original War 2001 Altar Interactive Virgin Interactive
The Orion Conspiracy 1995Divide By Zero Domark
Orion: Prelude 2014Spiral Game StudiosSpiral Game Studios
Orly's Draw-A-Story 1997 ToeJam & Earl Productions Broderbund
Osmos 2009 Hemisphere Games Hemisphere Games
Otto Matic 2001 Pangea Software Aspyr Media
Out of the Park Baseball 2008 OOTP Developments OOTP Developments
Outcast 1999 Appeal Infogrames
The Outforce 2000 O3 Games Pan Interactive, Strategy First
Outlast 2013 Red Barrels Red Barrels
Outlast 2 2017 Red Barrels Red Barrels
Outlaw Golf 2002 Hypnotix Global Star Software
Outlaws 1997 LucasArts LucasArts
Outlive 2001 Continuum Entertainment Continuum Entertainment, Take-Two Interactive
Outpost 2: Divided Destiny 1997 Dynamix Sierra On-Line
Outpost Kaloki 2004 NinjaBee Microsoft Game Studios
OutRun 2006: Coast 2 Coast 2006 Sumo Digital Sega
Outwars 1998 SingleTrac Microsoft
Over the Hedge 2006 Edge of Reality Activision
Overboard! 1997 Psygnosis Psygnosis
Overcooked 2016Ghost Town Games Team17
Overclocked: A History of Violence 2008 House of Tales Lighthouse Interactive
Overlord 2007 Triumph Studios Codemasters
Overlord II 2009 Triumph Studios Codemasters
Overlord: Fellowship of Evil 2015 Triumph Studios Codemasters
Overlord: Raising Hell 2008 Triumph Studios Codemasters
Overwatch 2016 Blizzard Entertainment Blizzard Entertainment
Overwatch 2 2023 Blizzard Entertainment Blizzard Entertainment