Antizombie Bunker

Bloodthirsty monsters overpowered your planet and that you volunteered to fight against them. Rather, pull up into the hopper to carry out bloody war. Shoot the zombies so cleverly that no one of them slipped into your shelter, or you will perish, and do not perform their task. Shoot is on them as soon as you see them on the horizon. Remember that as long as the zombies are on you at a distance, you are in danger. But as soon as they will move in your direction - not minuemo death, if you do not liquidate in the near future.