| Name | Release Date | Characters | Concepts | Developers | Franchise | Games | Genres | Locations | Objects | Platforms | Publishers | Themes |
|---|
| O (Game) | | | Single-character Title (Concept) | Smestorp Limited (Company) | | | | | | iPad (Platform)
iPhone (Platform) | Smestorp Limited (Company) | |
| O! My Genesis VR (Game) | | | God (Concept)
PlayStation Trophies (Concept)
PlayStation VR Support (Concept) | XPEC Entertainment Inc. (Company) | | | | Space (Location)
Sun (Location) | Crystal (Object)
Tree (Object) | PlayStation 4 (Platform) | XPEC Entertainment Inc. (Company) | Management (Theme) |
| O'Leary Manager 2000 (Game) | | | 2D (Concept)
Options Menu (Concept)
Year in the Title (Concept) | LiveMedia UK (Company) | | | Sports (Genre)
Simulation (Genre) | | Soccer Ball (Object) | Game Boy Color (Platform) | Ubisoft Entertainment (Company) | Management (Theme) |
| O'Riley's Mine (Game) | | | | Datasoft, Inc. (Company) | | | Action (Genre) | | | Atari 8-bit (Platform)
Commodore 64 (Platform) | Datasoft, Inc. (Company) | |
| O-Boy (Game) | | | | Chicago Coin (Company) | | | Pinball (Genre) | | | Pinball (Platform) | Chicago Coin (Company) | |
| O-SHI-KA-KE Saiminjutsushi: Toraware no In'yoku Marionette (Game) | | | Eroge (Concept)
Visual Novel (Concept)
Unity Engine (Concept) | Mad Raid (Company) | | | Adventure (Genre) | | | PC (Platform) | | Adult (Theme) |
| O.C.D. - On Completeness & Dissonance (Game) | | | Steam (Concept) | | | | Puzzle (Genre) | | | PC (Platform) | | |
| O.D.T. - Escape... Or Die Trying (Game) | | | Special Attack (Concept)
Third-Person Perspective (Concept)
Multiple Protagonists (Concept)
Magic (Concept)
Health (Concept)
Polygonal 3D (Concept)
PlayStation Underground (Concept)
E3 1998 (Concept)
Logo Box Art (Concept)
Original Soundtrack Release (Concept)
Steam (Concept)
Acronym Title (Concept)
Low-Poly (Concept) | SCEE Studio Liverpool (Company)
FDI (Company) | | | Action (Genre)
Action-Adventure (Genre)
Shooter (Genre) | | | PC (Platform)
PlayStation (Platform) | SCEE Studio Liverpool (Company) | Fantasy (Theme)
Sci-Fi (Theme) |
| O.M.G 26 Our Mini Games (Game) | | | Touch Controls (Concept)
Single-Player Only (Concept) | Dreams (Company) | | | Minigame Collection (Genre) | | | Nintendo DS (Platform) | Interchannel, Ltd. (Company)
UFO Interactive Games, Inc. (Company) | Comedy (Theme)
Horror (Theme) |
| O.R.B.: Off-World Resource Base (Game) | | | Bink Video (Concept)
Pre-Release Public Testing (Concept)
Acronym Title (Concept)
Epic Games Store (Concept) | Strategy First, Inc. (Company) | | | Strategy (Genre) | Space (Location) | Spaceship (Object) | PC (Platform) | Mindscape (Company) | Sci-Fi (Theme) |
| O.T.D (Game) | | | | | | | Simulation (Genre) | | | Android (Platform)
iPad (Platform)
iPhone (Platform) | | |
| O2Jam (Game) | | | Fmod (Concept) | O2Media (Company) | | | Music/Rhythm (Genre) | | | PC (Platform) | eGames, Inc. (Company)
Nowcom (Company) | |
| O3DX (Game) | | | | Egamea Game Studios (Company) | | | Driving/Racing (Genre)
Puzzle (Genre) | | | PC (Platform)
Mac (Platform) | Egamea Game Studios (Company) | |
| OASE - Other Age Second Encounter (Game) | | | | Zeiva Inc (Company) | | | Adventure (Genre)
Puzzle (Genre) | | | PC (Platform) | Zeiva Inc (Company) | Dating (Theme)
Anime (Theme) |
| OBEY (Game) | | | Single Word Titles (Concept) | | | | | | | | | |
| OCTGN (Game) | | | | Kelly Elton (Company) | | | Card Game (Genre) | | | PC (Platform) | | |
| OD (Game) | | | Unreal Engine 5 (Concept)
The Game Awards 2023 (Concept) | Kojima Productions (Company) | | | | | | Xbox Series X (Platform) | Xbox Game Studios (Company) | Horror (Theme) |
| OFF (Game) | | Dopefish (Character)
The Batter (Character)
The Judge (Character)
Zacharie (Character)
Dedan (Character)
Japhet (Character)
Enoch (Character) | Breaking the Fourth Wall (Concept)
Ghost (Concept)
Sprite (Concept)
Minigame (Concept)
Talking Animal (Concept)
Knights Templar (Concept)
Religion (Concept)
Pixel Art (Concept)
2D (Concept)
Top-Down Perspective (Concept)
Cats (Concept)
Digital Distribution (Concept)
Freeware (Concept)
Single-Player Only (Concept)
Steam (Concept)
RPG Maker Engine (Concept)
Single Word Titles (Concept) | Unproductive Fun Time (Company)
Mortis Ghost (Company) | | | Role-Playing (Genre)
Puzzle (Genre) | Mine (Location)
Factory (Location)
Library (Location) | Teddy Bear (Object)
Baseball Bat (Object)
Comic Book (Object)
Sugar (Object)
Music Box (Object)
Meat (Object) | PC (Platform)
Mac (Platform)
Nintendo Switch (Platform) | Unproductive Fun Time (Company) | Horror (Theme) |
| OGame (Game) | | | | | | | Real-Time Strategy (Genre) | | | Browser (Platform)
iPad (Platform) | GameForge (Company) | Sci-Fi (Theme) |
| OH NO! (Game) | | | 2D Characters in a 3D Scenario (Concept) | Asmik Ace Entertainment (Company) | | | Action (Genre)
Platformer (Genre) | | | PlayStation (Platform) | | |
| OH! RPG! (Game) | | | | RosePortal Games (Company) | | | Role-Playing (Genre) | | | PC (Platform) | Aldorlea Games (Company) | Fantasy (Theme) |
| OIO (Game) | | | 2.5D (Concept)
Kid Friendly (Concept)
Jump (Concept)
Polygonal 3D (Concept)
Digital Distribution (Concept)
GamersGate (Concept)
Impulse (Concept)
Indie Royale (Concept)
Unity Engine (Concept)
Desura (Concept)
Indie Game Stand (Concept)
indievania (Concept)
Single Word Titles (Concept) | Uncanny Games (Company) | | | Puzzle (Genre)
Platformer (Genre) | Underground (Location) | Spikes (Object) | PC (Platform)
Mac (Platform) | Uncanny Games (Company) | Abstract (Theme)
Fantasy (Theme) |
| OK K.O.! Let’s Play Heroes (Game) | | | Games Based on Television Shows (Concept)
Unity Engine (Concept)
E3 2017 (Concept)
PAX West 2017 (Concept) | Capy (Company) | | | Action-Adventure (Genre)
Brawler (Genre) | | | PC (Platform)
Nintendo Switch (Platform)
Xbox One (Platform)
PlayStation 4 (Platform) | Cartoon Network Games (Company) | |
| OK, Dracula (Game) | | | | Thinko (Company) | | | | | | Android (Platform)
iPad (Platform)
iPhone (Platform) | | |
| OK/Normal (Game) | | | Indie (Concept) | 98DEMAKE (Company) | | | Adventure (Genre) | | | PC (Platform) | 98DEMAKE (Company) | Horror (Theme) |
| OLDTV (Game) | | | | | | | Puzzle (Genre) | | | PC (Platform) | | |
| OLLLO (Game) | | | Digital Distribution (Concept)
Single Word Titles (Concept)
Palindrome Title (Concept) | | | | Action (Genre)
Puzzle (Genre) | | | Nintendo Switch (Platform) | SmileBoom (Company) | |
| OMG HD Zombies! (Game) | | | Zombie (Concept)
Digital Distribution (Concept)
PlayStation TV Support (Concept) | Laughing Jackal (Company) | | | Puzzle (Genre) | | | PC (Platform)
Nintendo Switch (Platform)
PlayStation Network (Vita) (Platform) | Laughing Jackal (Company) | Horror (Theme) |
| OMG-Z (Game) | | | Zombie (Concept)
Multiple Endings (Concept)
Upgradeable Weapon (Concept)
Top-Down Perspective (Concept)
Exploding Enemies (Concept)
Digital Distribution (Concept)
Exploding Barrel (Concept)
PlayStation Minis (Concept)
PlayStation Mobile (Concept)
PlayStation Plus (Concept)
Indie (Concept)
Steam Trading Cards (Concept) | Laughing Jackal (Company) | | | Puzzle (Genre) | | | PlayStation Network (PS3) (Platform)
PlayStation Network (PSP) (Platform)
PlayStation Network (Vita) (Platform) | Laughing Jackal (Company) | Horror (Theme) |
| OMG: Our Manic Game (Game) | | | Touch Controls (Concept)
Achievements (Concept)
Xbox Live (Concept) | Arkedo Studio (Company) | | | Shoot 'Em Up (Genre) | | | Windows Phone (Platform) | Xbox Game Studios (Company) | Abstract (Theme) |
| OMGWTFOTL (Game) | | Gordon Freeman (Character)
Osaka Bancho (Character)
Karl Gotch (Character)
OMGWTFOTL Protagonist (Character)
Kanagawa Bancho (Character)
Yukana Aihara (Character) | Decapitation (Concept)
Love (Concept)
Male Protagonists (Concept)
Melee (Concept)
Insanity (Concept)
Suicide (Concept)
Multiple Endings (Concept)
Protagonist Death (Concept)
Romance (Concept)
Cannibalism (Concept)
Dialogue Tree (Concept)
Death (Concept)
Visual Novel (Concept) | | | | Adventure (Genre) | Military Base (Location)
School (Location) | Katana (Object)
Pants (Object)
Belt (Object)
Sunglasses (Object)
Cigarette (Object)
Trench Coat (Object)
Crowbar (Object)
School Uniform (Object) | PC (Platform) | | Comedy (Theme)
Anime (Theme) |
| OMON Girl: Bottle Royal (Game) | | | | | | | | | | | | |
| OMON Simulator (Game) | | | | | | | | | | | | |
| OMSI 2 (Game) | | | Weather (Concept)
Digital Distribution (Concept)
In-Game Map Editor (Concept)
Steam (Concept)
Head Tracking (Concept)
Bus Simulation (Concept) | M-R Software (Company) | | | Driving/Racing (Genre)
Simulation (Genre) | Germany (Location)
Palma de Mallorca (Location) | Bus (Object) | PC (Platform) | Aerosoft GmbH (Company) | |
| OMSI: The Bus Simulator (Game) | | | Wheelman (Concept)
Public Transportation (Concept)
Realism (Concept)
Bus Simulation (Concept) | M-R Software (Company) | | | Driving/Racing (Genre)
Simulation (Genre) | Germany (Location)
Berlin (Location) | Bus (Object) | PC (Platform) | Aerosoft GmbH (Company) | |
| ONE. (Game) | | | Censored Version (Concept)
Visual Novel (Concept)
Remake (Concept)
Unity Engine (Concept) | novamicus (Company) | | | Adventure (Genre) | | | PC (Platform)
Nintendo Switch (Platform) | Nexton (Company)
ARES Inc. (Company) | Anime (Theme) |
| ONI: Road to be the Mightiest Oni (Game) | | Momotaro (Character) | Digital Distribution (Concept)
Steam (Concept) | Shueisha Games (Company)
Kenei Design (Company) | | | Action-Adventure (Genre) | | | PC (Platform)
Nintendo Switch (Platform)
PlayStation 4 (Platform)
PlayStation 5 (Platform) | Clouded Leopard Entertainment Inc. (Company) | Fantasy (Theme) |
| ONRAID (Game) | | | Single Word Titles (Concept) | Pragmatix (Company) | | | Action (Genre)
Shooter (Genre)
Platformer (Genre) | | | PC (Platform)
Mac (Platform)
Linux (Platform) | | |
| ONSIDE Complete Soccer (Game) | | | 2D Characters in a 3D Scenario (Concept) | Elite Systems Ltd. (Company) | | | Sports (Genre) | | Soccer Ball (Object) | PC (Platform)
PlayStation (Platform) | Telstar Electronic Studios Ltd. (Company) | |
| OOG: The Object Orientation Game (Game) | | | | MCM Productions (Company) | | | Strategy (Genre)
Educational (Genre) | | | PC (Platform) | | |
| OPUS Collection (Game) | | | | Sigono (Company) | | | Adventure (Genre)
Compilation (Genre) | | | Nintendo Switch (Platform) | PM Studios (Company) | |
| OPUS: Prism Peak (Game) | | | Multiple Endings (Concept)
Photography (Concept)
Digital Distribution (Concept)
Steam (Concept)
Indie (Concept) | Sigono (Company) | | | Adventure (Genre) | | Camera (Object) | PC (Platform)
Mac (Platform) | Shueisha Games (Company) | |
| OPUS: Rocket of Whispers (Game) | | | | Sigono (Company) | | | Adventure (Genre) | | | PC (Platform)
Mac (Platform)
Android (Platform)
Nintendo Switch (Platform)
iPad (Platform)
iPhone (Platform) | Flyhigh Works (Company)
Sigono (Company) | Post-Apocalyptic (Theme) |
| OPUS: The Day We Found Earth (Game) | | | | Sigono (Company) | | | Adventure (Genre) | | | PC (Platform)
Mac (Platform)
Android (Platform)
Nintendo Switch (Platform)
iPad (Platform)
iPhone (Platform) | Flyhigh Works (Company)
Sigono (Company) | |
| ORBB (Game) | | | Single Word Titles (Concept) | | | | Simulation (Genre)
Platformer (Genre) | | | Android (Platform)
iPad (Platform)
iPhone (Platform) | | Abstract (Theme)
Sci-Fi (Theme) |
| ORBITAL (Game) | | | Achievements (Concept)
Digital Distribution (Concept)
Single Word Titles (Concept) | Bitforge (Company) | | | Action (Genre) | | | iPad (Platform)
iPhone (Platform)
Windows Phone (Platform) | Xbox Game Studios (Company)
Bitforge (Company) | Abstract (Theme) |
| ORE (Game) | | | Single Word Titles (Concept) | | | | | | | | | |
| ORG (Game) | | | Single Word Titles (Concept) | | | | | | | | | |
| ORION: Dino Horde (Game) | | | Full Body Awareness (Concept)
Dinosaur (Concept)
Steam (Concept)
Valve Anti-Cheat (Concept)
WASD Movement (Concept) | Spiral Game Studios (Company) | | | Action (Genre)
First-Person Shooter (Genre) | | | PC (Platform) | Spiral Game Studios (Company) | Sci-Fi (Theme)
Prehistoric (Theme) |
| ORTHOISO (Game) | | | | | | | | | | | | |