FREE: National Zombie Park [steam key]

The listing, National Zombie Park [steam key] has ended.

http://store.steampowered.com/app/332780/National_Zombie_Park/

Survival-roguelike with procedurally generated reserve zombies where you can die at any second, and before the shot has to think twice - whether to spend precious bullet and do attract the sound of the shot even more zombies?
How long can you last?
Features
Realism in details: possibility of dying after a single bite, realistic reload, change batteries in the flashlight, weapon weight, etc.
Endless procedurally generated open world
Dynamic change of day and night, changing weather
Different types of zombies with unique features
The constant increase in the level of difficulty
Many types of weapons
Flashlight, night vision device and other equipment
Co-op mode for two players
The new generation engine Unreal Engine 4
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