2. Percy and the Roboguards - The Ice Pirates (1984)
In the far future water has become the most valuable substance in the universe (because obviously it has no value now). Two space ice pirates agree to help a princess find her father and overthrow the rulers who keep people enslaved to the trickle of water they are allocated. Lots of
Star Wars type scenes, but without the grandiose scale. I enjoyed this movie for what it was - a cheesy space opera comedy with funny robots in it. Oh, and Mary Crosby (the princess) looks hot.
Estimated chance you've seen this one: 20%