This game is HARD let me tell you this much, enemies can easily one-shot you in close range and inventory weight management is essential. I almost quit playing this game after reaching Chernobyl cos I ran out of ammo, luckily I took the advice from forum to turn off weapon burst fire and dump extra weights. This game really learn from the best FPS games from the previous era and turns into something original, just to name a few: Half Life, Fallout, F.E.A.R.. The atmosphere of the game is turely scary and there are mods to enhance it even further, I mean STALKER series are well-known for their mods. Looking forward to play the next 2 games and later Stalker 2 :)