First off - I'm not a huge fan of FPS. I get sick of FPS games most of the time and I don't even think about renting it. I've played FPS on X360 and didn't enjoy it a bit. Since that's been said, I heard alot of people talk about this game, so I rented it. It turned out to be the best game I've ever played.
Before you can even say about anything, the AI of the game is fantastic. I've never seen the AI so smart and strategic. The storyline is great, it doesn't tell you alot but it feels like you're at the beginning of something - obviously because it might turn out to be a franchise.
The Online feature is amazing. Online on Resistance never gets boring and it's really about skill and feels genuine.
For anyone reading this review, you should DEFINATELY BUY it.