Operation Shadow
Torus Games
Operation Wolf 3
arcade game machine
Opération Teddy Bear
Windows
MC2 France
Orange Pocket
Dreamcast, Windows, PlayStation 2
HOOKSOFT
OrbQuest, The Search For Seven Wards
Apple Macintosh
Orbient
Wii, Game Boy Advance
skip Ltd.
Orc Attack
ZX Spectrum, Commodore 64
Creative Sparks
Order Up!
iOS, Android, PlayStation 3, and 1 more
SuperVillain Studios
Ordyne
TurboGrafx-16, arcade game machine
Bandai Namco Amusement
Ore no Ryouri
PlayStation
Oregon Trail II
Minnesota Educational Computing Consortium
Orgarhythm
PlayStation Vita, Android
Acquire
Orient: A Hero's Heritage
Orion Burger
Disk Operating System
Sanctuary Woods
Orly's Draw-A-Story
Disk Operating System, Windows
ToeJam & Earl Productions
King Graham's Board Game Challenge: Checkers & Backgammon
King Kong 2: Ikari no Megaton Punch
Nintendo Entertainment System
Konami
King Neptune's Adventure
Color Dreams
King of Colosseum II
PlayStation 2
Spike
King of Clubs
Windows, PlayStation 2, Wii, and 1 more
Oxygen Studios
King of Fighters R-1
SNK
King of Fighters R-2
King of Kings
Atlus
Kingdom Crusade
Game Boy
Sculptured Software
Kingdom Conquest
iOS, Android
Sega
Kingdom O' Magic
Square Enix Europe
Kingdom Under Fire: A War of Heroes
Phantagram
Kingdom Under Fire: The Crusaders
Windows, Xbox
Kingdom of Paradise
PlayStation 4, PlayStation Portable
Climax Entertainment
Kingdoms of England II: Vikings, Fields of Conquest