Jetpack was a computer game for the ZX Spectrum by Ultimate Software (which later became famous as RARE) where you had to guide a spaceman round an alien planet picking up pieces of his spaceship and assembling them. Sounds pretty simple until you throw in a few scary looking aliens that don't like spacemen. I remember playing this a lot when I was home from school one day whilst I was ill. I also remember watching Never Say Never Again on the telly that day. Mmmmm - sick days were great back then!