| Title |
Year |
Genre |
| One Strike |
???? |
Action |
| One True Hero |
???? |
Adventure |
| One Way Heroics Plus |
???? |
RPG |
| One-Eyed Lee and the Dinner Party |
???? |
Adventure |
| One-Way Ticket |
???? |
Adventure |
| OneShot - World Machine Edition |
???? |
Adventure |
| ONI - Road to be the Mightiest Oni |
???? |
Adventure |
| Oni Ama - Watashi ni Amaete, Onii-chan |
???? |
Adventure |
| Oniken & Odallus Collection |
???? |
Action |
| Onsen Master |
???? |
Arcade |
| Ooblets |
???? |
Adventure |
| Ooops! 2 |
???? |
Arcade |
| Operation Zeta |
???? |
Action |
| OPUS - The Day We Found Earth |
???? |
Other |
| Opus Castle |
???? |
Adventure |
| Orangeblood |
???? |
Adventure |
| Orbals |
???? |
Arcade |
| Orbibot |
???? |
Arcade |
| Orbit.industries |
???? |
Management |
| Orbital Bullet |
???? |
Action |
| Orbital Bullet |
???? |
Action |
| Orcen Axe |
???? |
Action |
| Ord. |
???? |
Adventure |
| Ore ga Watashi ni Naru Made... - Becoming a She |
???? |
Adventure |
| Ore no Are ga Shinsei Sugite Chouhou Sarerun Daga!? |
???? |
Adventure |
| Orebody - Binder's Tale |
???? |
Action |
| Organic Engine |
???? |
Management |
| Origamihero Games 2D Collection |
???? |
Action |
| Orn - The Tiny Forest Sprite |
???? |
Platform |
| OS Omega |
???? |
Action |
| OSHIIRO |
???? |
Adventure |
| OshiRabu - Waifus Over Husbandos |
???? |
Adventure |
| Oshiri Tantei - Pupu Mirai no Meitantei Toujou! |
???? |
Adventure |
| Osyaberi! Puzzle Chigatan - Spot the Differences with Everyone |
???? |
Puzzle |
| Othello |
???? |
Puzzle |
| Othercide |
???? |
Action |
| Otherworldly |
???? |
Adventure |
| Otome Game no Hametsu Flag Shika Nai Akuyaku Reijou ni Tensei Shite Shimatta... ~Haran o Yobu Kaizoku~ |
???? |
Adventure |
| Ouija - They are among us |
???? |
Adventure |
| Our Battle Has Just Begun! episode 2 |
???? |
Adventure |
| Our Fantasy Quest |
???? |
Action |
| Our Two Bedroom Story |
???? |
Adventure |
| Our Winter Sports |
???? |
Sports |
| Our World is Ended |
???? |
Adventure |
| Out of Line |
???? |
Platform |
| Out of Space |
???? |
Action |
| Outbreak |
???? |
Adventure |
| Outbreak - Contagious Memories |
???? |
Adventure |
| Outbreak - Epidemic |
???? |
Adventure |
| Outbreak - The New Nightmare |
???? |
Adventure |
