This is the most far realistic first person shooter ever made. You simply cannot act like John Rambo and kill the whol
Its all about timing, you cannot shot someone within 4 miles or smthn, therefore you have to get closer and not bee seen yet if there are three or more enimies and if u are all by your side, you better start running the other way, cos if you miss , they wont!!! and another feature is hiding. Hiding and timing is crutial in this game, you cant wonder around and try too shoot people, you have to aim an get cover, as i said before your enimies are not dumm.