Abandonware games beginning with letter O sorted by popularity

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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.

Obliterator

DOS19892.9/5 shooter

Oliver & Company

DOS19894.2/5 action

O-Pong

DOS19963.1/5 action

Off Shore Warrior

DOS19884/5 sports

Oil's Well

DOS19843.4/5 action

Over the Reich

Windows XP/98/95Windows 3.x19963.9/5 strategy

Operation Europe: Path to Victory 1939-45

DOS19942.5/5 strategy

Operation Combat: Computer Battle Game

DOS19904.2/5 strategy

Oligopoly

DOS19873.3/5 strategy

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.