DOS

Obitus

Scenario Developments · 1991

Obliterator

Psygnosis · 1988

Off Shore Warrior

Titus France · 1988

Ogre

Origin · 1986

Oil Barons

Epyx · 1983

Oil's Well

Sierra On-Line · 1983

Old Time Baseball

Stormfront Studios · 1995

Olimpiadas 92: Gimnasia Deportiva

Topo Soft · 1992

Olympic Decathlon

Microsoft · 1980

Olympic Soccer

Silicon Dreams Studios · 1996

Omega

Origin Systems · 1989

Omnicron Conspiracy

First Star Software · 1989

On the Road

Expert Software · 1990

Once Upon A Time: Little Red Riding Hood

Coktel Vision · 1991

Once Upon a Forest

Sanctuary Woods · 1995

One Must Fall: 2097

Diversions Entertainment · 1994

One Step Beyond

Red Rat Software · 1993

Onslaught

Realms · 1989

Oo-Topos

Sentient Software Inc. · 1981

Ooze: Creepy Nights

Dragonware Games · 1988

Operation Body Count

Capstone Software · 1994

Operation Carnage

Midnight Synergy · 1996

Operation Crusader

Atomic Games · 1994

Operation Europe: Path to Victory 1939-45

Koei · 1991