There are many horror sub-genres, but cosmic horror is one of the most fascinating. These are the cosmic horror films to add some unorthodox frights to your spooky movie playlist. If you like your cosmic horror extra gooey, look no further than this 1980s classic. The Thing is one of the grossest sci-fi horror films ever made (let alone one of the greatest horror films of 1982), for fantastically gruesome and disgusting alien forms. Annihilation is the trippiest and most terrifying of cosmic horror for the surreal staging of exploring identity and mortality.