"You are Hotot, a cybernetic life form from a serene planet in a distant galaxy. Unfortunately, even in a galaxy far far away not everything is as peaceful as it first seems, for Hotot has discovered an alien missile base hidden on his planet. Manned by strange blue aliens, these evil intruders are using your planet as a launching site for their deadly warhead which is posed to destroy the galaxy's power source. With the help of the birdlike Gorfons, you must destroy the warhead, and prevent the destruction of the galaxy! Good luck Hotot. You are the Saboteur."
Saboteur is an enjoyable, multi-level shooter written by Howard Scott Warshaw, the Atari programmer and designer responsible for Yars' Revenge, Raiders of the Lost Ark, and E.T. Saboteur was never released by Atari, and at some point was modified to be released as a game based on the A-Team.
You can read more about Saboteur over at AtariProtos.com.