Abandonware games beginning with letter O sorted by popularity

If Oil Barons is Monopoly with attitude, Oil Imperium is its slightly more serious cousin who read a business textbook once and won’t let you forget it. Released in 1989, thi...

There’s a certain audacity in naming a sequel Oh no! More Lemmings, as if the developers knew exactly what they were unleashing upon your already overworked brain. This 1991 ...

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) ...

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...

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...

Oil Barons takes the glamorous world of oil speculation—yes, glamorous—and turns it into a strategy game that feels like Monopoly went through a midlife crisis. Release...

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 ...

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...

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...

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...