Ojaru Maru: Mitsunegai Jinja no Ennichi de Ojaru!

GBC

Ojaru Maru: Tsukiyo ga Ike no Takaramono

GBC

Ojyousama Express

PS1

Okabu

PS3

Okaeri! Chibi-Robo! Happy Richie Oosouji!

DS

Okage: Shadow King

PS2

Okhlos

PC Linux Mac

Okiraku Bowling 3D

3DS

Okiraku Cart 3D

3DS

Okiraku Daifugō 3D

3DS

Okiraku Golf 3D

3DS

OK K.O.! Let's Play Heroes

PC

Okuman Choja Game

GBA

Old Adventure

PC

Oldage

PC Linux Mac

OldGrad

PC

OldMaidGirl

PC

Old School FOTD

PC

oldTail

PC

OLDTV

PC Mac

O'Leary Manager 2000

GBC

Olson's Boxing Challenge

PC

Olympia Rising

PC Mac

Olympic Games: Atlanta 1996

Saturn

Olympic Gold: Barcelona '92

GameGear Sega Genesis