I don't know why my brain refuses to let it go, but Graeme Norgate's Astrolander from Timesplitters 2 is short and very sweet.

Also theres the opening theme from Escape from the Planet of the Robot Monsters.

Oh actually also the Italy round of Road Rash 3. I once worked in an Italian restaurant and would whistle this without knowing it was taken from some famous Italian opera, and the owner asked me how I knew the music, and I didn't have the heart to tell him.