The player controls a spaceship trapped on a planet inhabited by hostile aliens.

The goal is to upgrade the spaceship with parts scattered around the planet and mine a valuable element called "Cybernite".

[1] The atmosphere above ground is populated by flying aliens and clouds that drip acid, damaging the ship's shields.

The ship requires fuel to fly, and once exhausted will bounce along the ground of the planet unable to climb.

Fuel can be replenished by tankers on the planet surface, but damaged shields cannot be repaired.