データベース: O
Obduction
Release date: 2016. 8月 24. (PC)
Genre: Adventure, Puzzle
Developer: Cyan
Genre: Adventure, Puzzle
Developer: Cyan
OBEY
Release date: 2015. 5月 21. (PC)
Genre: Action, Strategy
Developer: Dan Dez
Genre: Action, Strategy
Developer: Dan Dez
Obliteracers
Release date: 2016. 2月 23. (PC)
Genre: Action, Racing
Developer: Varkian Empire
Genre: Action, Racing
Developer: Varkian Empire
Oblitus
Release date: 2015. 2月 27. (PC)
Genre: Action, Adventure
Genre: Action, Adventure
Obscure 2 The Aftermath
Release date: 2008. 3月 25. (PC)
Observation
Release date: 2019. 5月 21. (PC)
Genre: Adventure
Developer: No Code
Genre: Adventure
Developer: No Code
Observer
Release date: 2017. 8月 15. (PC)
Genre: Adventure
Developer: Bloober Team
Genre: Adventure
Developer: Bloober Team
Observer: System Redux
Release date: 2020. 11月 10. (PC)
Genre: Adventure
Developer: Bloober Team
Genre: Adventure
Developer: Bloober Team
Obulis
Release date: 2009. 3月 19. (PC)
Genre: Casual, Puzzle
Developer: IonFX
Genre: Casual, Puzzle
Developer: IonFX
Occupy Mars: The Game
Release date: 2023. 5月 10. (PC)
Genre: Simulation, Sandbox
Developer: Pyramid Games
Genre: Simulation, Sandbox
Developer: Pyramid Games
Oceanhorn: Monster of Uncharted Seas
Release date: 2015. 3月 17. (PC)
Genre: Action, Adventure, Role-playing game
Developer: Cornfox & Bros
Genre: Action, Adventure, Role-playing game
Developer: Cornfox & Bros
OCTAHEDRON
Release date: 2018. 3月 20. (PC)
Genre: Action
Developer: Demimonde
Genre: Action
Developer: Demimonde
Octodad: Dadliest Catch
Release date: 2014. 1月 30. (PC)
Genre: Casual
Developer: Young Horses
Genre: Casual
Developer: Young Horses
Octogeddon
Release date: 2018. 2月 08. (PC)
Genre: Action, Strategy, Casual
Developer: All Yes Good
Genre: Action, Strategy, Casual
Developer: All Yes Good
Octopath Traveler
Release date: 2019. 6月 07. (PC)
Genre: Role-playing game, Japanese RPG
Developer: Acquire, Square Enix
Genre: Role-playing game, Japanese RPG
Developer: Acquire, Square Enix
Octopath Traveler II
Release date: 2023. 2月 24. (PC)
Genre: Role-playing game, Japanese RPG
Developer: Acquire, Square Enix
Genre: Role-playing game, Japanese RPG
Developer: Acquire, Square Enix
OD (A HIDEO KOJIMA GAME)
Release date: TBA
Developer: Kojima Productions
Developer: Kojima Productions
OddPlanet
Release date: 2016. 5月 11. (PC)
Genre: Adventure
Developer: Indievision
Genre: Adventure
Developer: Indievision
Oddsparks: An Automation Adventure
Release date: 2024. 4月 24. (PC)
Genre: Simulation, Strategy
Developer: Massive Miniteam
Genre: Simulation, Strategy
Developer: Massive Miniteam
Oddworld: Abe's Oddysee
Release date: 1997. 8月 31. (PC)
Genre: Adventure, Platformer, Puzzle
Developer: Oddworld Inhabitants
Genre: Adventure, Platformer, Puzzle
Developer: Oddworld Inhabitants
Oddworld: New 'n' Tasty
Release date: 2015. 2月 25. (PC)
Genre: Adventure, Platformer, Puzzle
Developer: Just Add Water (Developments)
Genre: Adventure, Platformer, Puzzle
Developer: Just Add Water (Developments)
Oddworld: Soulstorm
Release date: 2021. 4月 06. (PC)
Genre: Action, Adventure, Platformer
Developer: Oddworld Inhabitants
Genre: Action, Adventure, Platformer
Developer: Oddworld Inhabitants
Ode
Release date: 2017. 11月 27. (PC)
Genre: Action, Adventure
Developer: Ubisoft Reflections
Genre: Action, Adventure
Developer: Ubisoft Reflections
Odium To the Core
Release date: 2018. 5月 11. (PC)
Genre: Action
Developer: Dark-1
Genre: Action
Developer: Dark-1
Odyssey - The Story of Science
Release date: 2017. 4月 19. (PC)
Genre: Adventure, Puzzle
Developer: The Young Socratics
Genre: Adventure, Puzzle
Developer: The Young Socratics
Of Bird and Cage
Release date: 2021. 5月 20. (PC)
Genre: Action, Adventure
Developer: Capricia Productions
Genre: Action, Adventure
Developer: Capricia Productions
Of Kings And Men
Release date: 2016. 8月 25. (PC)
Genre: Action, Role-playing game, Strategy
Developer: Donkey Crew
Genre: Action, Role-playing game, Strategy
Developer: Donkey Crew
OF MICE AND SAND -REVISED-
Release date: 2018. 3月 28. (PC)
Genre: Simulation, Strategy
Developer: Arc System Works
Genre: Simulation, Strategy
Developer: Arc System Works
Of Orcs and Men
Release date: 2012. 10月 11. (PC)
Genre: Action, Role-playing game
Developer: Cyanide Studio, Spiders
Genre: Action, Role-playing game
Developer: Cyanide Studio, Spiders
Off The Grid
Release date: 2024. 10月 08. (PC)
Genre: Action, TPS, Battle Royale
Developer: Gunzilla Games
Genre: Action, TPS, Battle Royale
Developer: Gunzilla Games
Off-Road Drive
Release date: 2011. 9月 29. (PC)
Offensive Combat: Redux!
Release date: 2017. 8月 18. (PC)
Genre: Action, FPS
Developer: ThreeGates
Genre: Action, FPS
Developer: ThreeGates
Offroad Mechanic Simulator
Release date: 2023. 7月 24. (PC)
Genre: Simulation, Racing
Developer: GameFormatic, Image Power
Genre: Simulation, Racing
Developer: GameFormatic, Image Power
Offroad Transport Simulator
Release date: TBA
Genre: Simulation
Developer: Don't Bite Devs
Genre: Simulation
Developer: Don't Bite Devs
Offspring Fling!
Release date: 2012. 5月 11. (PC)
Offworld Trading Company
Release date: 2016. 4月 28. (PC)
Genre: Strategy, RTS
Developer: Mohawk Games
Genre: Strategy, RTS
Developer: Mohawk Games
Ogre
Release date: 2017. 10月 05. (PC)
Genre: Strategy, Board game
Developer: Auroch Digital
Genre: Strategy, Board game
Developer: Auroch Digital
Oh My Godheads
Release date: 2017. 12月 05. (PC)
Genre: Action
Developer: Titutitech
Genre: Action
Developer: Titutitech
Oh...Sir! The Hollywood Roast
Release date: 2017. 5月 31. (PC)
Genre: Adventure, Simulation
Developer: Vile Monarch
Genre: Adventure, Simulation
Developer: Vile Monarch
Oh...Sir!! The Insult Simulator
Release date: 2016. 10月 25. (PC)
Genre: Simulation
Developer: Vile Monarch
Genre: Simulation
Developer: Vile Monarch
Oi, Innkeep!
Release date: TBA
Genre: Role-playing game, Simulation
Developer: Bad Bandit Games
Genre: Role-playing game, Simulation
Developer: Bad Bandit Games
OK K.O.! Let's Play Heroes
Release date: 2018. 1月 23. (PC)
Genre: Action, Adventure
Developer: Capybara Games
Genre: Action, Adventure
Developer: Capybara Games
Okami HD
Release date: 2017. 12月 12. (PC)
Genre: Action, Adventure
Developer: CAPCOM
Genre: Action, Adventure
Developer: CAPCOM
Okhlos
Release date: 2016. 8月 18. (PC)
Genre: Action, Strategy
Developer: Coffee Powered Machine
Genre: Action, Strategy
Developer: Coffee Powered Machine
Old Man's Journey
Release date: 2017. 5月 18. (PC)
Genre: Adventure, Puzzle
Developer: Broken Rules
Genre: Adventure, Puzzle
Developer: Broken Rules
Old School RuneScape
Release date: 2013. 2月 22. (PC)
Genre: MMORPG
Developer: Jagex
Genre: MMORPG
Developer: Jagex
Old Skies
Release date: 2025. 4月 23. (PC)
Genre: Adventure, Point & click
Developer: Wadjet Eye Games
Genre: Adventure, Point & click
Developer: Wadjet Eye Games
Old Time Hockey
Release date: 2017. 3月 28. (PC)
Genre: Sports
Developer: V7 Entertainment
Genre: Sports
Developer: V7 Entertainment
Old World
Release date: 2020. 5月 05. (PC)
Genre: Strategy, 4X, Turn-based strategy
Developer: Mohawk Games
Genre: Strategy, 4X, Turn-based strategy
Developer: Mohawk Games
Olija
Release date: 2021. 1月 28. (PC)
Genre: Action, Adventure
Developer: Skeleton Crew Studio, Thomas Olsson
Genre: Action, Adventure
Developer: Skeleton Crew Studio, Thomas Olsson
OlliOlli
Release date: 2014. 7月 22. (PC)
OlliOlli World
Release date: 2022. 2月 07. (PC)
Genre: Action, Platformer
Developer: Roll7
Genre: Action, Platformer
Developer: Roll7
OlliOlli2: Welcome to Olliwood
Release date: 2015. 8月 11. (PC)
Genre: Action, Sports
Developer: Roll7
Genre: Action, Sports
Developer: Roll7
Olympia Rising
Release date: 2015. 7月 23. (PC)
Genre: Action, Adventure
Developer: Paleozoic
Genre: Action, Adventure
Developer: Paleozoic
Omen of Sorrow
Release date: 2023. 3月 23. (PC)
Genre: Action, Fighting
Developer: AOne Games
Genre: Action, Fighting
Developer: AOne Games
Omensight
Release date: 2018. 5月 15. (PC)
Genre: Action, Adventure, Role-playing game
Developer: Spearhead Games
Genre: Action, Adventure, Role-playing game
Developer: Spearhead Games
Omerta: City of Gangsters
Release date: 2013. 1月 31. (PC)
Genre: Role-playing game, Simulation, Strategy
Developer: Haemimont Games
Genre: Role-playing game, Simulation, Strategy
Developer: Haemimont Games
Omina Mortis
Release date: TBA
Genre: Adventure, Role-playing game, Simulation
Developer: Rhino Games
Genre: Adventure, Role-playing game, Simulation
Developer: Rhino Games
Omni
Release date: Cancelled
Genre: Casual, Puzzle
Developer: Warhead Entertainment
Genre: Casual, Puzzle
Developer: Warhead Entertainment
OmniBus
Release date: 2016. 5月 26. (PC)
Genre: Action, Simulation, Casual
Developer: Buddy Cops
Genre: Action, Simulation, Casual
Developer: Buddy Cops
Omno
Release date: 2021. 7月 29. (PC)
Genre: Adventure, Casual
Developer: Jonas Manke
Genre: Adventure, Casual
Developer: Jonas Manke
OMSI 2
Release date: 2013. 12月 11. (PC)
Genre: Simulation
Developer: M2H
Genre: Simulation
Developer: M2H
On The Road - The Truck Simulator
Release date: 2017. 3月 30. (PC)
Genre: Simulation
Developer: Toxtronyx interactive
Genre: Simulation
Developer: Toxtronyx interactive
Once Human
Release date: 2024. 7月 09. (PC)
Genre: Action, Survival, MMO
Developer: Starry Studio
Genre: Action, Survival, MMO
Developer: Starry Studio
One Dog Story
Release date: 2017. 4月 28. (PC)
Genre: Action, Adventure, Platformer
Developer: Big Way
Genre: Action, Adventure, Platformer
Developer: Big Way
One Finger Death Punch
Release date: 2014. 3月 03. (PC)
Genre: Action, Beat 'em up, Fighting
Developer: Silver Dollar Games
Genre: Action, Beat 'em up, Fighting
Developer: Silver Dollar Games
One Finger Death Punch 2
Release date: 2019. 4月 15. (PC)
Genre: Action, Beat 'em up, Fighting, Casual
Developer: Silver Dollar Games
Genre: Action, Beat 'em up, Fighting, Casual
Developer: Silver Dollar Games
One Lonely Outpost
Release date: 2023. 6月 26. (PC)
Genre: Simulation, Life simulation
Developer: Freedom Games
Genre: Simulation, Life simulation
Developer: Freedom Games
One More Night
Release date: 2016. 11月 18. (PC)
Genre: Action, Strategy
Developer: Big Red Planet
Genre: Action, Strategy
Developer: Big Red Planet
One Must Fall: Battlegrounds
Release date: 2003. 12月 19. (PC)
One Piece Burning Blood
Release date: 2016. 9月 02. (PC)
Genre: Action, Fighting
Developer: Spike Chunsoft
Genre: Action, Fighting
Developer: Spike Chunsoft
One Piece Odyssey
Release date: 2023. 1月 12. (PC)
Genre: Role-playing game, Japanese RPG
Developer: ILCA
Genre: Role-playing game, Japanese RPG
Developer: ILCA
One Piece Pirate Warriors 3
Release date: 2015. 8月 28. (PC)
Genre: Action, Adventure, Fighting
Developer: Koei Tecmo
Genre: Action, Adventure, Fighting
Developer: Koei Tecmo
One Piece Pirate Warriors 4
Release date: 2020. 3月 27. (PC)
Genre: Action, Fighting
Developer: Koei Tecmo
Genre: Action, Fighting
Developer: Koei Tecmo
One Piece World Seeker
Release date: 2019. 3月 15. (PC)
Genre: Action, Adventure
Developer: Ganbarion
Genre: Action, Adventure
Developer: Ganbarion
One Punch Man: A Hero Nobody Knows
Release date: 2020. 2月 28. (PC)
Genre: Action, Fighting
Developer: Spike Chunsoft
Genre: Action, Fighting
Developer: Spike Chunsoft
One Step From Eden
Release date: 2020. 3月 26. (PC)
Genre: Action, Adventure, Strategy
Developer: Thomas Moon Kang
Genre: Action, Adventure, Strategy
Developer: Thomas Moon Kang
OneShot
Release date: 2016. 12月 09. (PC)
Genre: Adventure, Casual, Puzzle
Developer: Little Cat Feet
Genre: Adventure, Casual, Puzzle
Developer: Little Cat Feet
Oni
Release date: 2001. 1月 28. (PC)
Onimusha 2: Samurai's Destiny
Release date: 2025. 5月 23. (PC)
Genre: Action, Adventure
Developer: CAPCOM
Genre: Action, Adventure
Developer: CAPCOM
Onimusha: Warlords
Release date: 2019. 1月 15. (PC)
Genre: Action, Hack and Slash
Developer: CAPCOM
Genre: Action, Hack and Slash
Developer: CAPCOM
Onimusha: Way of the Sword
Release date: 2026. (PC)
Genre: Action, Adventure, Role-playing game
Developer: CAPCOM
Genre: Action, Adventure, Role-playing game
Developer: CAPCOM
ONINAKI
Release date: 2019. 8月 22. (PC)
Genre: Action, Role-playing game, Japanese RPG
Developer: Tokyo RPG Factory
Genre: Action, Role-playing game, Japanese RPG
Developer: Tokyo RPG Factory
Onmyoji
Release date: 2018. 4月 19. (PC)
Genre: Adventure, Role-playing game, Strategy
Developer: NetEase Games
Genre: Adventure, Role-playing game, Strategy
Developer: NetEase Games
Onrush
Release date: TBA
Genre: Racing, Vehicular combat
Developer: Codemasters
Genre: Racing, Vehicular combat
Developer: Codemasters
Onward
Release date: 2016. 8月 30. (PC)
Genre: Action, Simulation, FPS
Developer: Downpour Interactive
Genre: Action, Simulation, FPS
Developer: Downpour Interactive
Ooblets
Release date: 2020. 7月 15. (PC)
Genre: Simulation, Casual, Farming simulation
Developer: Glumberland
Genre: Simulation, Casual, Farming simulation
Developer: Glumberland
Oozi: Earth Adventure
Release date: 2013. 12月 05. (PC)
Genre: Platformer, Casual
Developer: Awesome Games Studio
Genre: Platformer, Casual
Developer: Awesome Games Studio
Open Roads
Release date: 2024. 3月 28. (PC)
Genre: Adventure
Developer: Open Roads Team
Genre: Adventure
Developer: Open Roads Team
Operation Abyss: New Tokyo Legacy
Release date: 2017. 3月 27. (PC)
Genre: Role-playing game, Japanese RPG
Developer: 5pb., Experience, MAGES.
Genre: Role-playing game, Japanese RPG
Developer: 5pb., Experience, MAGES.
Operation Babel: New Tokyo Legacy
Release date: 2017. 5月 16. (PC)
Genre: Role-playing game, Japanese RPG
Developer: 5pb., Experience, MAGES.
Genre: Role-playing game, Japanese RPG
Developer: 5pb., Experience, MAGES.
Operation Flashpoint: Cold War Crisis
Release date: 2001. 8月 30. (PC)
Operation Flashpoint: Dragon Rising
Release date: 2009. 10月 06. (PC)
Operation Flashpoint: Red River
Release date: 2015. 4月 20. (PC)
Genre: FPS
Developer: Codemasters
Genre: FPS
Developer: Codemasters
Operation Flashpoint: Resistance
Release date: 2002. 7月 10. (PC)
Operation Thunderstorm
Release date: 2008. 11月 14. (PC)
Operation: Tango
Release date: 2021. 6月 01. (PC)
Genre: Adventure, Puzzle
Developer: Clever Plays
Genre: Adventure, Puzzle
Developer: Clever Plays
Operencia: The Stolen Sun
Release date: 2019. 3月 29. (PC)
Genre: Role-playing game
Developer: Zen Studios
Genre: Role-playing game
Developer: Zen Studios
Opus Magnum
Release date: 2017. 12月 07. (PC)
Genre: Simulation, Puzzle
Developer: Zachtronics
Genre: Simulation, Puzzle
Developer: Zachtronics
OPUS: Rocket of Whispers
Release date: 2018. 2月 08. (PC)
Genre: Adventure
Developer: SIGONO
Genre: Adventure
Developer: SIGONO
