Abandonware games beginning with letter O sorted by release date

Oligopoly is an abandoned turn-based strategy game designed by James Kerwin, developed by PC Design Associates and released by XOR Corporation in 1987 for DOS.

Omega is an abandoned science fiction themed strategy game developed and released by Origin Systems in 1989 for DOS, Amiga, Apple II, Atari ST, C64. Omega is a rare example of a programming game about robots.

Obitus is a role-playing video game developed by Psygnosis and released in 1991 for various platforms including the Amiga, Atari ST, and DOS. It combines elements of role-playing games (RPGs) and action-adventure games and is set in a fantasy world.In the game, players control the protagonist who finds themselves transported to the realm of Obitus ...

One-Nil Soccer Manager is a text-based soccer management simulation game that was popular in the late 1980s and early 1990s. It was developed for various home computer systems, including DOS, Commodore 64 and Amiga. In One-Nil Soccer Manager, players take on the role of a soccer team manager, making strategic decisions to guide their team to s...