Strictly speaking, this is a sci-fi/action movie but it was very much marketed at the horror audience and certainly had enough violence and gore to please them. Unfortunately, what it sorely lacked was interesting, believable, rounded characters and a gripping plot, the two things which had made Neil Marshall's first two films so acclaimed and successful.
As a sci-fi cheesefest, Doomsday is okay, and it's technically impressive. But it's corny, clichéed and in parts utterly stupid. So not a bad film as such, but a crushing disappointment after Dog Soldiers and The Descent.
I've not seen Marshall's fourth film, Centurion. I don't think it actually played round here.