As an avid Horror genre fan I just recently started to also get into Sci-Fi. However, I could use some recommendations on Films I should watch. I'm looking mainly for Sci-Fi/Horrors but any good action packed Sci-Fi will do.

Here are the Sci-Fi/Horror films I have so far:

All the Alien/Predator/AVP films
Event Horizon
Pandorum

Here are the regular Sci-Fi films I have:

The original and prequel Star Wars Trilogies
Immortal (2004)

Thanks in advance.

ONE LAST THING: No plain Horror films. Already seen 98% of those. Looking for good Sci-Fi/Horror mix or plain Sci-Fi that is awesome.

Definitely Aliens
wrong image

Martyrs very raw French horror film and Sunshine which is a good Sci-Fi movie

Well you're in for some spacey treat. A bit slow but good for dark evenings. Also if you haven't seen the remake of John Carpenter's cult horror "The Thing" I would recommend both of those!

No, I am looking for Sci-Fi Horror films or just Sci-Fi....Not plain Horror. Seen all those, lol. (For those recommending Texas Chainsaw Massacre and Martyrs)

Is Planet Terror horror or sci-fi? Awesome flick either way.
Old school cool is They Live with Roddy Piper.
How recently have you been getting into sci=fi? Surely you've seen Blade Runner and Road Warrior right? Oh, and tons of contrary comments aside, I thought Prometheus was enjoyable.

For Sci-Fi you should watch Moon, it's kinda indie movie, bot is one of the best ones i've seen so far:

or

also a good one is Cargo:

and for Horror, the guy up there is right, Alien and The Thing are pretty much the best you can find out there

Jurassic Park 1&3 and eXistenZ

Oh and Cube, all 3.

Just looked at the trailer for "Cargo" and WOW..thanks for that!! + 1 for you.

How about any of the cube movies? Cube, Hypercube or the newest whatever its called...