You are a space pilot hired to rescue pilots imprisoned on an alien planet. After landing you can pickup a few weapons and a medikit from your spaceship, then move through the door to confront the aliens! The prisoner can be found in a prison to the North. Press F to tell him to wait, press F again to make him follow you, back to your spaceship.

Use the keyboard (W,A,S,D) to move, and use the mouse to look around and fire your weapons. Select your current weapon using the number keys, or the mouse wheel. When hit you can receive up to three wounds, slowing you down. Using a medikit (M) will heal all wounds you currently have.

After every mission, a more dangerous mission begins. If you rescued the prisoner, extra ammo will be available at the start of the next mission.