In 3D Maze you're a 'spaceman' who, on a routine trip back from Mars while in orbit around Venus, is accidentally beamed down into a distant space maze somewhere in the alien terrain. All you have to survive is a space suit, oxygen tank (with a limited oxygen supply), a compass and a map of the maze. You must make it to the exit of the maze before your oxygen supply runs out!

The game is a simple graphical 1st person maze game. Each move subtracts 1 from the total of your limited oxygen count.