abandonware games sorted by popularity

Clue Master Detective is an abandoned strategy game developed by Dalali Software and released by Leisure Genius in 1989 for DOS, Amiga, Apple II, Atari ST, C64. Clue Master Detective is based on the well known board game Clue (also known as Cluedo). Clue can be played in single player, but the best gaming experience come from the multi-player mode.

Side Arms: Hyper Dyne is a side-scrolling shoot-'em-up arcade game developed and published by Capcom in 1986 and later ported on various platforms. Players control a "mobilsuit," a futuristic combat robot, in a war against alien invaders. Side Arms is set in outer space and features mechanical and alien-inspired aesthetics.

BC Racers is a DOS unconventional (to say the least) racing game that features a prehistoric theme, designed by Martin Gibbons, developed and published by Core Design in 1955. It's the third game in the Chuck Rock series, the first two being platformers not available for PC.