This is what I perceive to be the first flight simulator. You navigate your space shuttle through a world of electric fences and guns. I remember being a young kid playing this game on and on and on. I always got killed at the point where you had to decide whether to go above or below the electric fence. At the end of each level you finally flew off into space. This was a great combination of flight simulator and shoot ’em up. You can’t beat the Zaxxon.