dude i seriously have drawn a blank.. leon the professional is on my top 5 favorites, but thats not a scifi flick lol... seriously when put on the spot ive gone brain dead
Narrowing the list down to five choices is not easy.
2001, ASO
Star Wars OT and ROTS
Blade Runner 2049 / BR 2019
Aliens / Alien
The Thing (Carpenter version)
Although I am tempted to interchange some of these titles with:
Akira
The BTTF series
Planet of the Apes (original films)
Invasion of the Body Snatchers (Philip Kaufman version)
The Mad Max series
Dredd
The Fly
Inception