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All games, from A to Z.
The complete GameForever catalogue, from the founding classics to recent releases. Pick a letter to browse the titles; each entry details the game's world rank, ELO score and duel history.
Letter O
506 games
- Onimusha: Warlords 2019 · Action-adventure
- Oninaki 2019 · JRPG
- Onion Knight 2014 · RPG
- The Onion Knights: Definitive Edition 2017 · Strategy
- Onirim: Solitaire Card Game 2017 · Strategy
- Onirism 2025 · Action-adventure
- Only If 2014 · Horror
- Only One Hope 2017 · Action-adventure
- Only Up! 2023 · Adventure
- OnlyCans: Thirst Date 2021 · Visual novel
- Onmyoji 2016 · Card & Board
- Onrush 2018 · Racing
- Onsen Master 2022 · Action-adventure
- Onset 2019 · Action RPG
- Onslaught 1989 · Fighting
- Ontamarama 2007 · Rhythm
- Onward 2017 · FPS
- oO 2014 · Arcade
- Ooblets 2022 · Simulation
- Öoo 2025 · Platformer
- Ooops! 2 2021 · Arcade
- The Ooze 1995
- Oozi: Earth Adventure 2013 · Platformer
- Open Country 2021 · Sports
- Open Roads 2024 · Adventure
- Open Season 2006 · Action-adventure
- Open Sorcery 2016 · RPG
- OpenTTD 2004 · Sandbox
- Operation Abyss: New Tokyo Legacy 2015 · RPG
- Operation Apex 2017 · Simulation
- Operation Babel: New Tokyo Legacy 2017 · RPG
- Operation C 1991 · Platformer
- Operation Darkness 2007 · Strategy
- Operation Flashpoint: Cold War Crisis 2001 · FPS
- Operation Flashpoint: Dragon Rising 2009 · FPS
- Operation Flashpoint: Elite 2005 · Shoot 'em up
- Operation Flashpoint: Red River 2011 · FPS
- Operation Logic Bomb 1993 · Shoot 'em up
- Operation Thunderbolt 1988 · FPS
- Operation Thunderstorm 2008 · FPS
- Operation Warcade VR 2017 · Shoot 'em up
- Operation Wolf 1987 · Arcade
- Operation Wolf Returns: First Mission 2023 · FPS
- Operation: Matriarchy 2005 · FPS
- Operation: New Earth 2016 · Strategy
- Operation: Tango 2021 · Action-adventure
- Operation: Vietnam 2007 · Shoot 'em up
- The Operational Art of War IV 2017 · Strategy
- The Operative: No One Lives Forever 2000 · FPS
- The Operator 2024 · Point-and-click
- Operencia: The Stolen Sun 2019 · Action RPG
- Opoona 2007 · Platformer
- Opossession 2024 · Action RPG
- Oppai Slider 2 2005 · Simulation
- Oppaidius Summer Trouble! 2018 · Simulation
- Optika 2016 · Puzzle
- Opus Magnum 2017 · Sandbox
- Opus: Echo of Starsong 2021 · Visual novel
- Opus: Prism Peak 2026 · Adventure
- Opus: Rocket of Whispers 2017 · Visual novel
- Opus: The Day We Found Earth 2015 · Visual novel
- Oracle 2017 · Simulation
- Orange Moon 2016 · Action RPG
- Orange Season 2024 · Simulation
- Orbia 2018 · Arcade
- Orbit 2015 · Shoot 'em up
- Orbit - Playing with Gravity 2015 · Simulation
- Orbital Bullet 2022 · Roguelite
- Orbital Gear 2014 · Platformer
- Orbital Racer 2017 · Racing
- Orbo's Odyssey 2023 · Platformer
- Orborun 2013 · Racing
- Orbox C 2016 · Puzzle
- Orbt XL 2017 · Arcade
- OrbusVR 2017 · Action RPG
- Orc Hunt 2019 · Action-adventure
- Orchard Odyssey: Cherry Chase 2025 · Platformer
- Orchard Odyssey: Chestnut Christmas 2025 · Platformer
- Orchard Odyssey: Pumpkin Party 2025 · Platformer
- Orcs 2016 · Action RPG
- Orcs & Elves 2006 · RPG
- Orcs Must Die! 2011 · Strategy
- Orcs Must Die! 2 2012 · Strategy
- Orcs Must Die! 3 2020 · TPS
- Orcs Must Die! Deathtrap 2025 · Roguelite
- Orcs Must Die! Unchained 2017 · Strategy
- Ord. 2019 · Strategy
- Order of Battle: World War II 2015 · Strategy
- The Order of the Snake Scale 2024 · Shoot 'em up
- The Order of the Thorne: The King's Challenge 2016 · Point-and-click
- Order of War 2009 · Strategy
- Order Up!! 2008 · Strategy
- The Order: 1886 2015 · TPS
- The Oregon Trail 1971 · Strategy
- The Oregon Trail 1985 · Survival
- The Oregon Trail 2021 · Strategy
- The Oregon Trail Deluxe 1992 · Simulation
- Oregon Trail II 1995 · Point-and-click
- The Oregon Trail: 40th Anniversary Edition 2011 · Survival
- Oreshika: Tainted Bloodlines 2014 · JRPG
- Organ Trail 2013 · Strategy
- Organ Trail: Director's Cut 2012 · Horror
- Organic Panic 2014 · Platformer
- Orgarhythm 2012 · Rhythm
- Ori and the Blind Forest 2015 · Metroidvania
- Ori and the Blind Forest: Definitive Edition 2016 · Metroidvania
- Ori and the Will of the Wisps 2020 · Metroidvania
- Oriental Empires 2016 · Strategy
- Original Frisbee Disc Sports: Ultimate & Golf 2007 · Sports
- Original Journey 2017 · Action RPG
- The Original Strife: Veteran Edition 2014 · Action RPG
- Original War 2001 · Strategy
- Orion Drift 2024 · Sports
- Orion Sandbox 2016 · Sandbox
- Orion Sandbox Enhanced 2018 · Action RPG
- Orion: Prelude 2013 · Action RPG
- Orions: Legend of Wizards 2008 · Card & Board
- Orna 2017 · Strategy
- Orogenesis 2018 · Action RPG
- Orphan 2018 · Metroidvania
