Unconventional sports: fantasy, futuristic, etc.

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.

Grand Monster Slam is an action sports game developed by Golden Goblins and published by Rainbow Arts in 1989. The game was released for a variety of platforms, including the Amiga, Atari ST, Commodore 64, and MS-DOS. The game is set in a fantasy world where players compete in a sport called Monster Slam. The sport involves two opposing player...

Olympic games were something back in the 80s and the 90s: Winter Games, Summer Games, California Games, anything-you-can-think-of games. Some imaginative developer thought that the world needed a different kind of "multisport" action game and came up with he idea behind Knight Games.

Skate or Die is an abandoned sports game, developed and released by Electronic Arts in 1988 for DOS and a number of other platforms. Skate or Die is a multi-sport kind of game, including every kind of unconventional "sport" done on skateboard. A sequel, Ski or Die, was released an year later.