You can choose one of 3 game modes, two of which differ from each other only in terms of difficulty, and the third is the most difficult, but also endless survival mode. We advise you to choose the first and the easiest. Having chosen the regime, we immediately find ourselves in the center of hostilities, or rather, in the house in which there was only one commando from the counter-strike. Remember that you need to survive at all costs, so try to move around the house so that the zombies cannot drive you into a corner, and also be sure to close the doors they break. "R" - is responsible for reloading. "F" - restores the door.