Vote for the greatest sci-fi film ever, I try to include all

Can't include all of them, but I'm even including some I'm not fond of, but I know are loved (such as Blade Runner and Sunshine), and some beloved ones I even deplore, but they're there. In order to include as many as possible, I avoided the ones generally geared more towards Horror, such as the Dracula, Frankenstein, Mummy, and such, and the fantasy world Universe films, and also the multiple King Kong, Godzilla, and zombie ones. I'll leave them for other polls.

Truly sorry about forgetting the classic FIRST SPACESHIP ON VENUS. If I could edit in before votes, I would do so. Others I would like to have room for are THEY LIVE and THE THING (the first two things)