Codename: Angel

In the mines neighbouring the closed town N is extracted a new kind of energy - blue crystals, with the help of which the government is developing a top-secret biological weapons. During routine checkouts the system malfunctioned, the accident occurred, resulting in toxic gas spread in a radius of hundreds of miles, killing every living thing in its path. But city residents did not die, they mutated into zombies. For breakdown elimination the government decided to send a special agent code-named "Angel"...