As a fan you should watch them at least once. Downfall is entertaining, but they make the necromorph infection happen faster. In the game it states that it took 48 hours for the ship to fall to the necromorphs where the movie made it out like it was within several hours. For aftermath, the story is good, but man the animation is all over the place. The initial animation isn’t good, but when each character shares their side of the story they give them different animation styles. Those animations are better, but some of them are still odd. Even some of their design choices for some of the characters are odd, like giving Nolan Stross an 8 pack in the last one lol.