They should remake this game.
I just got this game recently from Ebay. To begin with its not bad, I like the atmosphere it creates (through cut scenes and radio reports) and the novelty of only fighting against zombies and having to do head shots each time; however the game is just far too linear. Quite frankly they shouldn't of rushed it as this game had a lot of potential. The game could've been a true master piece but it plays out more like an early 90's FPS.
IMO they should remake this game or create a sequel where they can create a far more indepth environment like Silent Hill instead of a simple "keep moving forwards" maze. I've heard some people hate the graphics, personally I don't mind them its just the linear nature of it that annoys me.
Grubenstyle
http://www.grubenstyle.com/