ZOMBIE: Best Free Shooter Game

ZOMBIE: Best Free Shooter Game - You will play a Lieutenant in an elite unit. You trained in the best places of the world, to be trained in shooting from most modern rifles. You are prepared for any scenario of the battle. You are the best of the best! But you weren't ready for what happens deep underground in a top secret database. After scientific experiments on the territory of the base there was a rift in the space - time continuum. Through the portal are a crowd of vicious monsters. All you have to do is to keep monsters within the base, scientists do not figure out how to correct their mistakes.