I bought this game last week because I wanted a new game, it was in the greatest hits selection and because I had heard good buzz on it. Totally worth the $20, way longer than I thought it would be, four different characters who can play the levels in different ways (for example, the steathly chick can shimmy under low doors and into vents and whatnot) and not so futuristic that it gets really unbelievable. All the weapons function like real world weapons, no plasma rifles or things like that. I lost track of my ranting but the point here is, you should play it.