Omikron Basic v3.01 (1988)(Omikron)[a]
Omikron Basic v3.03 (19xx)(Omikron)
Omnicron Conspiracy (1990)(Image Works)
On the Road (1990)(Lifetimes)(Disk 1 of 2)
On the Road (1990)(Lifetimes)(Disk 2 of 2)
On the Road (1990)(Lifetimes)(de)(Disk 2 of 2)
On the Road (1990)(Lifetimes)(de)(Disk 1 of 2)
Once a King v2 (1988-03-24)(Lavery, Darryn - Griffiths, Mark)(FW)
One Day Cricket (19xx)(Paladin)(PD)
Online Backgammon (1991)(Becker, David)(FW)[Monochrome]
Only! Valency (1994-12-06)(Schulz, Jens)(de)(SW)
Onslaught (1989)(Realms)
Onslaught (1989)(Realms)[cr Equinox][t]
Onslaught (1989)(Realms)[cr Equinox][t][a]
Onslaught (1989)(Realms)[cr Quant]
Oo-Topos (1986)(Softkill Int.)
Ooze (1988)(Dragonware Games)(de)[cr Bladerunners][m EMT]
Ooze v1.2E (1988)(Dragonware Games)
Ooze v1.2E (1988)(Dragonware Games)[a]
Operation Ble Sunrise v3.00 (1992-09)(Creative Insanity)(SW)
Operation Garfield (1992)(Brankin, D.J.)(PD)
Operation Garfield (1992)(Brankin, D.J.)(PD)[a]
Operation Harrier (1990)(U.S. Gold)[cr Empire][b]
Operation Jupiter (1988)(Infogrames)(fr)[b]
Operation Jupiter (1988)(Infogrames)(fr)[b2]
Operation Jupiter (1988)(Infogrames)(fr)[cr Bladerunners]
Operation Jupiter (1988)(Infogrames)(fr)[cr Bladerunners][a]
Operation Jupiter (1988)(Infogrames)(fr)[cr Bladerunners][m Rain Man]
Operation Jupiter (1988)(Infogrames)(fr)[cr Przemek Wysocki]
Operation Jupiter (1988)(Infogrames)(fr)[tr en-de partial]