Only three ????? OK then
Star wars A new hope
Star Trek II Wrath of Kahan
Matrix
Dune (He who controls the spice, controls the universe)
Dark City (It seems you have discovered your unpleasant nature)
Gattaca (there's no gene for fate)
blade runner
hitchhiker's guide to the universe
the original "day the earth stool still"
there are some great and horrible korean sci-fi movies... i really enjoy them all...
The Thing (1982)
Jurassic Park
The Mummy(1999)
Back to the future I, II
2012
Independence day
Star Trek, Star Wars, and X-Men
Honey, I Shrunk The Kids
Predator
Space Cowboys
NUMQUAM FIDES CATELLUS!!!
The X Files,Star Trek,The Mummy
The Book of Eli, X-Men movies, and Star Trek. ^_^
Only 3? Star Wars: Return of the Jedi, Star Trek: Wrath of Khan, Back to the Future 2
Forbidden Planet, Silent Running. The Day The Earth Stood Still.
Bladerunner (too bad Phillip K. Dick died before his story was converted to film)
2001 a Space Odyssey (Stanley Kubrick was a genius director on this one)
Avatar (for it beauty, not it's lame SF plot…)
Blade Runner
The Day the Earth Stood Still (the original)
Dune, even with the cheesy graphics. They really don't hold up.
The Abyss
Star Wars
12 Monkeys
Art can never exist without naked beauty displayed. Jurassic Park
X-Files
The Mummy
1. The Forbidden Planet (I love Shakespeare.)
2. Logan's Run (The movie was good but the books were better.)
3. The Fantastic Invasion of Planet Earth.
I have got to see the movie "Silent Running". I always love to stray from the beaten path.
Going to go for films with significance:
Star Wars - because I used to watch it over and over with my Dad
Hitch Hiker's Guide - because I love everything about it
Serenity - for giving Firefly the send off that it more than justified / deserved
Star Trek
Space odyssey 2001
District 9
Serenity - Still such a shame Fox torpedoed Firefly, should have been something great.
I Am Legend - Will Smith as usual delivers an incredible performance that can't be overlooked.
Star Trek (2009) - I am by no means a Trekkie, and I mean no disrespect to the Star Trek franchise, but I think Abrams really knocked it out of the park, bringing forth a Trek film that appealed not just to traditional fans but to audiences everywhere.
2001 - Stanley Kubrick nailed this one (and that silent explosion was just amazing) from a brilliant short story by Arthur C Clarke
Terminator 2 - (well the whole series really, but T2 was the best I think)
Inception - I had some difficulty keeping track of the dream-levels but what a concept!
Oh and since it's not actually a film (yet, though I hope it gets made into one) I feel I can sneak this one in and it's Origin by JT Brannan
Starship Troopers
The Empire Strikes Back
Star Trek 2 : The Wrath of Khan
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1. 2001: A Space Odyssey
2. Alien
3. The Matrix
These are the top three but there are a lot of other ones which I like too: Planet of the Apes, Rise of the Planet of the Apes, Robocop, Terminator (I & II), Starship Troopers ... (and the list goes on).
1.) All 6 Star Wars
2.) Lord of the Rings trilogy
3.) All 8 Harry Potters
1. Star Wars-Empire Strikes Back
2. Star Trek-Wrath of Kahn
3. Aliens
Armageddon, MIB, and being a fan of the show, the FIRST X-Files film
the orginal "day the earth stood still"
"dune" (the director's cut)
hmmmm the third one... "the last starfighter" is a fun one...
1. Star Trek- Wrath of Khan
2. Mad Max movies
3. Robocop movies
My top 3 favorite sci-fi movies are:
Bladerunner
Alien
Jurassic Park
I truly enjoy many more but those are the 3 best. I liked the 3 original old Star Wars movies. It seems like most of the sci-fi movies in my lifetime rely too heavily on graphics and lack in screenwriting, plot, and acting.