Abandonware games beginning with letter O sorted by popularity

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...

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 ...

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...

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, ...

Based on the Disney movie that taught us cats can sing, dance, and apparently navigate 1980s New York, Oliver & Company for DOS (1989) is a surprisingly earnest platformer. You...

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...

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...

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 g...

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 It was originally made for platforms like the Apple II, Atari 8-bit, Commodore 64, and MS-DOS, but was la...