Invincible version of the zombie crisis of nightmare, the game is all invincible and ammunition have increased five times, including the villain of the value of life has also increased five times, and speed up the pace of upgrading of all weapons, the players each completed a defensive can be a weapon Perform an upgrade, also accelerated the other attributes of the weapon unlock. Players faster a variety of weapons upgrades, allow players to experience Gengshuang massacre zombie pleasure. Zombie crisis is another new work, the nightmare of the zombie crisis, terrible music upper primary zombie groups Results appear, you have different weapons that can destroy them, do not let them attack your base, come to challenge!