Add Yahoo as a preferred source to see more of our stories on Google. Some of the greatest sci-fi movies of all time revolve around humans in a desperate struggle for survival. Sometimes we’re fighting time-traveling robots or out-of-control plagues.

Plenty of alien invasion movies have become box office hits and certified classics, but here are some forgotten alien invasion movies that still hold up today.

Watch the Alien franchise in order with our comprehensive list, from the 1979 original to Alien: Earth, and including the Alien vs. Predator crossovers. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.