Opa Opa
Action | 2 players | 1987
Open Season
1
Action - Platformer | 1 player | 2006
Open Sonic
2
Action - Platformer | 1 player | 2010
Open Sonic
3
Action - Platformer | 1 player | 2010
4
Open Transport Tycoon Deluxe
5
Management | 32 players | 2004
3
OpenArena
6
FPS | 12 players | 2005
Opening Night
Simulation - Edutainment - Creation | 1 player | 1995
6
OpenLara
5
Action - Platformer - Adventure | 2 players | 2016
OpenRA
2
Strategy | 12 players | 2007
Opera Fatal
Adventure - Edutainment - Music | 1 player | 1996
Operación Cyborg
Action - Shoot'em up | 1 player | 1989
Operation Air Assault
Simulation | 1 player | 2005
Operation Air Assault 2
Action | 1 player | 2007
Operation AirStorm
Action - Simulation | 1 player | 1994
Operation Armored Liberty
1
Action | 1 player | 2003
Operation Body Count
Action - FPS | 1 player | 1994
Operation C
1
Action | 1 player | 1991
Operation C
Action | 1 player | 1991
Operation Carnage
Action - Shoot'em up | 1 player | 1996
Operation Cleaner
Strategy | 1 player | 1998
Operation ComBat
Strategy | 1 player | 1990
Operation Combat II: By Land, Sea & Air
Strategy | 2 players | 1993
Operation Crusader
Strategy | 1 player | 1994
Operation Europe: Path to Victory 1939-45
Strategy | 2 players | 1994
Operation Europe: Path to Victory 1939-45
1
Strategy | 2 players | 1994
Operation Harrier
Action - Shoot'em up | 1 player | 1990
Operation Jupiter
1
Action | 1 player | 1988
Operation Just Because
Board game | 1 player | 1995
Operation Logic Bomb
Action - Shooter | 1 player | 1993
Operation Logic Bomb: The Ultimate Search & Destroy
1
Action - Shooter | 1 player | 1993
Operation Market Garden: Drive on Arnhem, September 1944
Strategy | 2 players | 1985
Operation Neptune
Action - Edutainment | 1 player | 1991
Operation Odin
Adventure - Reflexion | 1 player | 1996
Operation Secret Storm
Action | 1 player | 1992
Operation Spacehog
Action - Shoot'em up | 1 player | 2000
5
Operation Stealth
3
Adventure | 1 player | 1990
Operation Thunderbolt
1
Action - Shooter | 1 player | 1994
Operation Thunderbolt
3
Shooter | 2 players | 1988
Operation Vulture
Action - Shoot'em up | 1 player | 1992
Operation Vulture III: Cyber Chopper
Action - Shoot'em up | 1 player | 1995
1
Operation WinBack
3
Action | 2 players | 2001
Operation WinBack 2: Project Poseidon
2
Action | 4 players | 2006
1
Operation Wolf
3
Shooter | 2 players | 1990
2
Operation Wolf
Shooter | 1 player | 1989
Operation Wolf
Shooter | 1 player | 1989
1
Operation Wolf
4
Shooter | 1 player | 1990
3
Operation Wolf
9
Shooter | 1 player | 1987
Operation Wolf
1
Shooter | 1 player | 1989
Operation Wolf
1
Shooter | 1 player | 1990
Operation Wolf
1
Action - Shoot'em up | 1 player | 1989