| Title |
Platform |
Genre |
Release Date |
| OIO: The Game |
PC |
Platform |
na |
| Okabu |
PS3 |
Platform |
Oct 18, 2011 |
| Okage: Shadow King |
PS2 |
RPG |
Oct 8, 2001 |
| Okami |
PS2, WII |
Action Adventure |
Sep 19, 2006 |
| Okami HD |
PS3 |
Action Adventure |
Oct 30, 2012 |
| Okamiden |
DS |
Action Adventure |
Mar 15, 2011 |
| Oknytt |
PC |
Adventure |
na |
| Oldboy |
PSP MOVIE |
Other |
na |
| Omega Five |
X360 |
Action |
Jan 9, 2008 |
| Omerta - City of Gangsters |
PC, X360 |
Strategy |
Jan 31, 2013 |
| Omerta: City of Gangsters - The Arms Industry |
PC |
Other |
May 3, 2013 |
| Omerta: City of Gangsters - The Con Artist |
PC |
Other |
Mar 8, 2013 |
| Omerta: City of Gangsters - The Con Artist {UK} |
PC |
Other |
Mar 8, 2013 |
| Omerta: City of Gangsters {UK} |
PC |
Other |
na |
| OMG! High School Triple Play Pack |
PC |
Action |
Apr 7, 2009 |
| Omikron: The Nomad Soul |
PC |
Adventure |
Nov 2, 1999 |
| OMSI |
PC |
Simulation |
Nov 30, 1999 |
| Once Upon A Knight |
PC |
Strategy |
Sep 25, 2003 |
| Once Upon a Time in Mexico |
PSP MOVIE |
Other |
na |
| One Must Fall: 2097 |
PC |
Fighting |
Jan 1, 1995 |
| One Must Fall: Battlegrounds |
PC |
Action |
Dec 19, 2003 |
| One Piece: Gigant Battle |
DS |
Action |
Nov 30, 1999 |
| One Piece: Grand Adventure |
PS2, GC |
Fighting |
Aug 29, 2006 |
| One Piece: Grand Battle |
GBA |
Action |
Sep 6, 2005 |
