Rewatch. Still decent, but slow about 40 minutes in, then picks up again. Henry Rollins was awful. Acting was otherwise decent. Effects and monsters were great.
Going to rewatch Legion too. Any other suggestions for people trapped in a smallish building trying to stay alive while ghosts/monsters/aliens, not other people, try to get in? There's Demon Knight, but i've already watched that a bunch of times over the years.