Critical strike: Dead or survival

Dead or survival, destroy hordes of zombies walking down the street. Powerful rifles and other shooting weapons should be used. Try to survive in this zombie apocalypse game. People in the big city were turned into walking dead by the plague. It is possible to take a shooting position on the roof of a building. Make use of your rifle's optical sight to shoot zombies. Rescue the people that survived. Buy and upgrade new weapons.