well, considering who i'm making the recommendations for, i take it i'll have to dig into fairly obscure territory...
i just recommended Children of Men in my last comment elsewhere, for instance, but you've probably seen it.

hmm. ever see Silent Running, with bruce dern?
if you haven't, don't watch this trailer until you have, as i think it gives away far too much.

that was one of my sci-fi favorites growing up, along with this.
which also gives away too much of the plot.

Children of men is a big favorite of mine, I watched that movie many times, I loved the cinematography and I ended up reading P.D. James' book as well.

I don't think I have seen either Silent Running or Time after Time, I will definitely check them out. Thanks.

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I watched Invasion the other night, and was actually pleasantly surprised. It's a remake of Invasion of the Body Snatchers - and it was kind of neat that the message was that Zoloft, Prosac etc are making us into the replacement people.

At least that's what I took from it.

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Soylent Green, Logan's Run and Dark City have been on my mind lately.

BrainStorm was a great movie with Christopher Walken and Natalie Wood's last before her untimely death.

I watched Soylent Green, Logan's Run and Dark City. I thought Dark City was much better then the matrix.

The Fifth Element, Videodrome, Acción mutante, Pi, Altered States, Westworld, Rollerball (orig. from the 70's, with James Caan)

Equilibrium (it's based upon a Philip K. Dick book, I think), is sort of fun - but not really the hight of cinema. Theres a clip of it somewhere on the sift, I'm sure...

Have you seen Stalker, or Solaris?
Thers also a strange Polish/Japanese movie that's Tarkovsy-ish - Avalon, about videogames in the future.
(I myself am not actually a Tarkovsky fan)

I watched all those except Acción mutante.

I thought Avalon was very silly and the look of the film was nauseating after a while.

seen this sci-fi parody, Galaxy Quest (1999)?

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^ That was a really fun movie.

How about the New Zealand movie The Quiet Earth. Really like that one.

Yes....I was thinking the Quiet Earth while reading these suggestions.....

Zardoz B+ (Sean Connery)
This Island Earth (classic B)
Millennium-(b-film, great concept)

Ever hear of Star Wars?

Is Eraserhead considered Sci-fi? WALL-E?

Outland (another Sean Connery one)
The Wraith
Freejack
The Lawnmower Man (there’s a sequel, but I haven’t seen it)
Cube, Cube 2, or Cube Zero
Mission to Mars
Fantastic Voyage (classic!)

And if you want to see the most ridiculed, according to Insultingly Stupid Movie Physics (click "Movie Reviews" on the left), watch The Core.
You can probably find some other sci-fi titles there to enjoy also.

p.s. another vote for Time After Time, also a growing-up favorite of mine. When I see/hear Jack the Ripper I always think David Warner.

^Nice! The Wraith! Good one, firefly. Farhad, have you seen Danny Boyle's Sunshine? It's pretty amazing until the very end. I know that's not a ringing endorsement, but... It's worth a look. Jacob's Ladder you've probably seen. The Thing is awesome. If you're in the mood for some b-movie goodness, be sure to check out Killer Klowns from Outer Space!

Gattaca
Sunshine
Brazil
Minority Report

Battlefield Earth?

Titan A.E. was pretty good for an animated film. I wouldn't say it's only for kids or only for adults either - so it may not be your bag, baby.

2001, Solaris (original), Brazil, THX1138 ... you've no doubt seen everything I would recommend.

Damn I watched almost all of that.

I really liked Titan A.E. back in high school. Not enough animated films deal with space and the future (besides anime).

I watched Sunshine. I was sorely disappointed with the ending. It just got retarded in 10 minutes flat. I thought Event Horizon was much better.

The Thing I have on DVD. Best film Carpenter ever made.

Battlefield Earth I watched once. I thought it was shit but not as bad as some people claim it is. Travolta was really ridiculous looking.

Brazil is a great Terry Gilliam flick. Loved it.

The Cube movies I always loved.

I've seriously been giving this some thought, and pretty much all my recommendations have already been recommended or seen by you.

So fuck all yaz.

I guess you've seen this whole top 50?;)
http://www.imdb.com/chart/scifi

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For your consideration:
http://www.videosift.com/video/A-Boy-and-his-Dog-Trailer-1975

I guess I'm the only person who cannot get into those Cube movies. The story seems lazy and the acting tends to be sub par, though as I remember the first Nightmare on Elm Street had terrible acting, too.

Whatever you do, never watch this movie. Never.

I liked the Cube movies when they came out, I think they really have been surpassed over the years and haven't aged well. When it came out it was a different take on the standard horror/haunted house type of deal.

Thanks for the great list Eklek, and yes unfortunately I have watched almost the whole list. I was surprised to see Russian flicks like Kin Dza Dza and Ivan Vasevilich Meanyt Prafesiou, thought they are comedy sci-fi films more then hard sci-fi. Great films, though without knowing Russian one wouldn't really enjoy them, at least not in the same way as Solaris and Stalker. Yeah Stalker wasn't on that list though was it?

I got Fail Safe recently, so am gonna watch that. I haven't seen any of the newer flicks like Iron Man, because I want to see them on DVD and not in cinemas in Kuwait where they cut up movies.

Great to see lost of Anime on that list, especially Nausicaä of the Valley of the Wind, Howls Moving Castle, Castle in the Sky.... though I never heard of The Girl Who Leapt Through Time so I will getting that.

Also first time I ever heard of The Holy Mountain and A Boy and his Dog... thanks to you all...

How about Coma?

http://www.imdb.com/title/tt0077355/

Old one but a goodie.

How about Plan 9 from outer space?

It's not only a sci-fi flick, it's literally one of the worst movies ever made.

OK, it's really popular and you can call me a douchebag for it and you've probably seen it but I still have to recommend the Serenity/Firefly series because of the thread.

Primer will drive you batty. http://www.imdb.com/title/tt0390384/

Be sure to check it's wiki page to sort out the madness, particularly the chart that maps the characters' time travel.

http://en.wikipedia.org/wiki/Primer_(film)

>> ^Farhad2000:
Thanks for the great list Eklek, and yes unfortunately I have watched almost the whole list. I was surprised to see Russian flicks like Kin Dza Dza and Ivan Vasevilich Meanyt Prafesiou, thought they are comedy sci-fi films more then hard sci-fi. Great films, though without knowing Russian one wouldn't really enjoy them, at least not in the same way as Solaris and Stalker. Yeah Stalker wasn't on that list though was it?

I'll put the Russian ones on my list, hopefully I get the jokes..maybe there's a site full of spoilers explaining the dialogue's funniness..
Stalker is on this imdb list as well, a must see..

BTW about Holy Mountain (and El Topo):
http://www.videosift.com/video/filmmaker-Alejandro-Jodorowsky-on-the-holy-mountain-el-topo

The Incredible Shrinking Man (1957). Has one of the best endings I've ever seen.

I also enjoyed Ritana (2002). Also known as "The Returner" in the USA.

Well, pretty much all the good sci-fi films are already listed. a couple might be cool to also check out are:
Boys from Brazil
Save the greenplanet
Memories, which is a collection of 3 short films by 3 great Directors: Kôji Morimoto,Tensai Okamura and Katsuhiro Ôtomo. The 3rd short film is my all time fav.

Many brilliant choices here. For a far less brilliant choice, but your best shot at DIY rockabilly sci fi shambles (with good musical numbers), please check out The American Astronaut.

I'm always late to these things but here are some of my favorites.

Gattaca
12 Monkeys
2010
Alien
Aliens
Bicentennial Man
Predator
Deep Impact
They Live
The Thing
Light Years (Gandahar)
Men In Black
Evolution
..of course, I'm betting you've already seen all of these. Oh well.