Abandonware games beginning with letter O sorted by popularity

Omega (1989, DOS) is what happens when someone hands you a robot, a wrench, and a thick manual, then says, “Good luck out there.” Instead of piloting a mech, you actual...

Before NBA 2K made your thumbs cry, there was One-on-One Basketball. You get to control either Larry Bird or Julius Erving in a thrilling display of 80s pixelated hoop dreams. The ...

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) ...

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, inc...

If you’ve ever wanted to command a basketball team without having to actually dribble or break a sweat, Omni Play Basketball (1990, DOS) has your number. The game lets you ma...

Omnicron Conspiracy (1989, DOS) is a detective adventure wrapped in a cozy sci-fi blanket. You play as a Galactic Patrol agent solving crimes across alien worlds, all rendered in c...

A gentle adventure inspired by the animated film, Once Upon a Forest (1995, DOS) delivers an eco-friendly story wrapped in side-scrolling gameplay. You guide three tiny forest crea...

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 It was originally made for platforms like the Apple II, Atari 8-bit, Commodore 64, and MS-DOS, but was la...

A year earlier, the other Omega (1988) hit DOS and Linux, and no, it’s not the same game wearing a disguise. This one blends sci-fi exploration with tactical decision-making,...

If you’ve ever stared at a Monopoly board and thought, “This needs more spreadsheets,” then Oligopoly is basically your spiritual home. Released in 1987 for DOS, ...

Omikron: The Nomad Soul (1999, Windows XP) is the kind of game that leans across the table and says, “What if we mashed every genre together and asked David Bowie to help?&rd...