Would
Repo Man count? I sort of doubt it, even with a dead alien in the trunk.
Probably my favorite, all around, is a little known "last man on earth" movie called
The Quiet Earth.
Some others that come to mind:
Donnie Darko Absolutely one of the best movies of the last decade or so-- only peripherally science fiction though.
The Road Warrior Great, great movie-- one of my all-time favorites.
Bladerunner The director's cut is the best-- the narration in the theatrical version is distracting, and the ending is pathetic.
Brazil Great dystopian social commentary. Probably (sadly?) more accurate than
1984
The Fifth Element Just an all around entertaining movie.
Abyss Director's cut only-- the original just doesn't tell the whole story.
2001, A Space Odyssey Dull and slow, but majestic.
A Boy and His Dog I would've done it too.
Titan A.E. Very satisfying movie.
Alien,
Aliens and
Alien 3 Yes, I like
Alien 3-- I think it was a fitting finale to the series.
Alien
Resurrection, however, should have never been made.
The Matrix It was a great movie. The sequels... were not.
The Thirteenth Floor Same concept as
The Matrix, but human drama instead of action fest.
Ghost in the Shell Served as an inspiration for
The Matrix.
Armitage III Another great anime.
12 Monkeys Great cast, great plot.
Johnny Mnemonic Okay, so it's Keanu Reeves, stiff as always, but I still like it.
Dark City Sci fi noir.
Strange Invaders Aliens living among us-- I would think this would be a favorite of many of the ATSers.
Logan's Run The future as seen from the 70s
The Blood of Heroes Moody, violent dystopian version of the classic sports underdog story.
Rollerball The original-- not the truly execrable remake.
Cherry 2000 Perfect women aren't real-- real women aren't perfect.
Tank Girl And they have a tank.
Cube It's allegorical-- remember that. Really all it is is a group of archetypes trying to find their way, each in their own fashion, in a
world in which they just happened to find themselves.
That should be plenty...