One of the best survival horrors ever. Fallout wishes it could do atmosphere as well as this game can. I can't believe I had this in my library for over a year without playing it. Well worth the money.

Good mods;
Call of Chernobyl (makes the game truly open world and adds maps from the previous 2 games)
Arsenal overhaul (has both vanilla versions and ones to work with Call of Chernobyl)