Alien from '79, Cthulhu in space. This one I could skip since I had already seen it. Regular people go to investigate something and end up regretting it. The design elements are amazing, H.R. Geiger is brilliant, and the acting is fabulous.
Lots of different ideas for Call of Cthulhu, or some other creepy role-playing games out there. Definitely non standard thinking in some cases. Go ahead and give them a shot.