Since I have played all the parts of this series, I can say that has taken place here graphically continuous improvement. The story is again succeeded and the AI has improved in their reactions and not so predictable. It come but very real feelings on the part of very frightening environment. An addicting game that the third part specifies rightly attach great importance to the story and that is loaded with human relationships with each other of the characters. Those looking for a pure shooter the expected but the nerves of everyone else as a recommendation for this genre actually rather uncommon.