Underrated Sci-Fi Movies Where Earth Fends Off An Alien Invasion

List Rules
Vote up the movies that deserve another look.

Alien invasion movies are a dime a dozen. And for good reason! It is a genre that has been around for decades, and it isn't going anywhere soon. It seems like superheroes are always fending off the armies of some extraterrestrial foe, and some of the biggest films in history have been centered around visitors from outer space - hello, Independence Day. But there are plenty of alien invasion films that don't necessarily get the plaudits they deserve due to a variety of reasons.

This list runs the gamut from big-budget flops like Cowboys & Aliens to B-movie cult hits like Killer Klowns from Outer Space. We've got Netflix fare such as Extinction and black comedies like Slither. There is something for everyone here as we run through some of the most underrated sci-fi movies where humanity has to stick it to invaders from another world.