Alien

Alien is a 1-player invisible maze game for the BBC Micro.

The player has been trapped in the ship's ventilator system without a weapon, pursued by a dangerous alien. Played on a 21 x 21 grid, the player can move in the cardinal directions, while being chased by an alien. There are numerous walls that the player can't see in the dark until they bump into them. The player knows the location of the alien and themselves. There are only two exits: one forward and one port. The player tries to exit safely before being eaten by the alien.