Got it a day early and was impressed with the way the game has started. Played approx 4hrs so far and the atmosphere of the game is very well done giving you feeling of being underground in the metro system which maintains a very claustrophobic feel especially when having to wear the gasmask, which when you are attacked by the creatures in the tunnels becomes cracked which obscures your view adding more tension. When emerging from the Metro topside the level of tension remains and i felt as tho i was going to be attacked at any second, which i normally was. As you progress a bit more into the game you will come across area with human enemies where you can choose to go on in a stealthy manner or not, although i found that someone always spotted me and then the brown stuff hit the fan. When going through these areas it is extremely tough and very challenging considering i was on normal setting. Characters in the game are all pretty good so far and there seems like there will be a good selection of weapons which can be upgraded with scopes/silencer etc. The plot is story driven and so far i have been very impressed with the game and would def suggest it as a purchase. Genuine tension!!!!!