Over the course of countless years, giant monster movies have been a thrill ride that has been thoroughly enjoyed by audiences. It’s an over-the-top, nonsensical giant monster film that is definitely a good time for those who can appreciate a fun parody. No one might have ever heard of Trollhunters, but it's definitely one of the smartest giant monster films ever made. Primeval blends all the best parts of giant monster movies, gifting audiences survival horror, absolute chaos, and heavy monster-movie thrills. It stands as a grim, overlooked giant animal thriller that definitely deserves its place on this list of giant monster movies that are 10/10 but have never been heard of.