Good play, beautiful graphics, you learn many things by reporting to previous installment. This is a good conclusion to the trilogy. Less unhealthy than the 1 and the 2 moisn scary, it is nice to be able to play 2 coop. There are 2 different characters for which the gameplay is different which doubles the life because we want to test 2. In addition there are 2 for the game. One of the personages uses traditional weapons (playing as in a conventional fps), the other character has powers (telekinesis, possession) really pleasant to use. This is all the more fun to play 2.