10 R-Rated Sci-Fi Movies You’ve Probably Never Heard Of

Science fiction, as a genre, has always achieved the impossible. It has not only pushed creative boundaries by imagining the future of science and technology but also built expansive fictional universes worth going back to. The most popular movie franchises of all time, like Star Wars and Star Trek, told stories of alien worlds and interstellar civilizations. But not all sci-fi is about spaceships and lasers. Some of the genre’s most ingenious movies opt for dark and mature stories involving human nature and society.