Directed by John Carpenter
Written by John Carpenter
IMDB

A gang traps a group of people in an old police station. The gang is like a group of zombies but with guns. That essentially the movie as far as I could tell.
Now, a simple plot does not necessarily make for a bad movie. Hell, maybe it more often makes for a good film. The climax of the flick is pretty great, when they attemp to escape from the police station. Up until that point, I had a hard time paying attention, but that might not be the fault of the movie.
This is worth a watch, for sure. The last 20 minutes is amazing.

7.5/10