DOS abandonware games

Oil's Well is an action-puzzle game released by Sierra On-Line in 1983/84. It was originally made for platforms like the Apple II, Atari 8-bit, Commodore 64, and MS-DOS, but was later ported to other systems. The game is set in an underground world, and the player controls a machine designed to collect oil from a network of caverns and tunnels. The...

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.

One Must Fall: 2097 is a fighting game released in 1994 by Epic MegaGames. Set in a futuristic world, the game features giant humanoid robots known as HARs (Human-Assisted Robots) controlled by human pilots. The storyline revolves around a tournament organized by the multinational corporation WAR (World Aeronautics and Robotics), where pilots compe...

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...