Mine Shaft

Mine Shaft is a video game in the action genre developed by Sierra On-Line, Inc. and published by IBM originally released in 1983. It is currently playable on DOS.

A mediocre action game that follows in the footsteps of Pac-Man, but much less fun. As Trixter points out in his review:

'unexciting gameplay and flawed controls make this a game to avoid.' The good: The gameplay is the usual arcade fare; you can shoot to protect yourself from the robots in the mine while trying to collect the gems and get to the exit. It's easy to learn.

Downside: the mines you have to traverse are completely randomly generated, which would normally be good because you'd never play the same mine twice. But a particularly nasty behavior of the mine creation process can create some very tight diagonal passages, which are incredibly difficult to navigate because the game doesn't process diagonal controls. The bad guys can navigate these tunnels effortlessly, of course. This is unfair.

In short: use this game as a demonstration of how cartridge games work on the PCjr, but otherwise avoid it.'

It is possible that we have multiple downloads available when different versions exist.