From: Ten Truly Underrated Sci-Fi Movies

Ten Truly Underrated Sci-Fi Movies:

http://www.movieretriever.com/movies/1688157/Primer

Primer: Writer/director Carruth's debut film might be the world's first thinking-man's time travel movie, beautifully shot for an absurdly low $7,500...
eXixtenZ: A great one.
Gattaca
Silent Running
.......