I rented it the other day, and I didn't like it too much. The combat system is weird, and it is actually pretty scary. Lots of cracks coming out of walls to eat people, and Satan trying to talk to you through them after they get spit back out of the cracks, or something. The fun part that I messed around with for a little is combining items...Fire bullets are the best haha.
I read about it, and it's about cult activity under Central Park, based on a few actual facts. It's pretty interesting, and I would read up on it if you get the opportunity.