[chadbang]

1. 2001: A Space Odyssey
2. A Clockwork Orange (If it is Sci-fi. I've never heard it called that, but since others here seem to think so...)
3. Alien
4. Planet of the Apes
5. Village of the Damned

 

[MightyFine Shindig]

Blade Runner
Star Wars V
The Matrix
Serenity
Eternal Sunshine of the Spotless Mind

 

[Dzjudz]

The Fifth Element
Gattaca
The Matrix (not the sequels

)

 

[Ttvetjanu]

Just watched Moon. Will definitely have to put that in my top 5. Kevin Spacey was awesome as a computer/robot.

 

[Bigrock2150]

Quote:

1. 2001: A Space Odyssey
2. A Clockwork Orange (If it is Sci-fi. I've never heard it called that, but since others here seem to think so...)
3. Alien
4. Planet of the Apes
5. Village of the Damned

Well I think its considered a Sci-fi because it was based on the future and what future hooligans (droogs) will act like. 
 
Pair that with the machine/experiments they use on Alex, and you have yourself a Sci-fi. 

 

[jeffreyj900]

Quote:

Not to sound like a film snob, but the original La Jetee was better than 12 Monkeys by a considerable margin. A lot shorter too. You should check it out some time.

I'll have to check that out.  I'd never heard of it before today.

 

[Spiritboxer]

Star Wars (original trilogy)
Blade Runner
The Fifth Element
Forbidden Planet
Serenity

 

[Bigrock2150]

Almost forgot, Wild Wild West (the remake). I love the Victorian steampunk in that movie!

 

[71877]

2001
Return of the Jedi -ewoks
Blade Runner directors cut with voiceover
Terminator 2
Alien (or A Clockwork Orange, dont consider it a scifi tho.

 

[tjkurita]

Blade Runner
The Matrix
2001
Children of Men
A Clockwork Orange

 

[Seaside]

Omega man
Westland
Babylon 5
Six million dollar man
Battlestar Galactica
 
Lots of good movies though, I choose old ones that gave me impressions.

 

[JIGF]

A top five in this genre is hard, but here it is.
 
The Hitchhiker's Guide to the Galaxy
A.I.
Matrix I and II
Star Wars series
Gentleman Broncos
 
Worth mentioning: A Scanner Darkly, The Fountain, Moon, and although they are not movies, Taken and Battlestar Galactica (2004).

 

[J W]

Solyaris
Moon
Blade Runner
2001
THX 1138
 
Edit: Just reviewed the thread and D'oh, how could I forget Metropolis?

 

[zotjen]

Metropolis
Attack of the 50ft Woman
2001
Invasion of the Saucer Men
Hardware

 

[nick_charles]

Blade Runner - w/o voiceover
Repo Man - (not Repo Men) - it has aliens and a flying car in it !
Forbidden Planet
Quatermass and the pit
This Island Earth