Miner 2049er
Miner 2049er is a platform game in which Bounty Bob, a mountie, explores an abandoned uranium mine full of mutant creatures. The game was created by Bill Hogue of Big Five Software, and this Atari 2600 cartridge was published by Tigervision in 1983. It is a cut-down version of the original, with three screens instead of ten, but the idea of claiming every piece of floor survives intact. You can play it here in your browser.