So well-made and sophisticated action game with zombies I have not seen for a long time. It is more combo of action and strategy. Imagine you are a police captain in a one small urban area and you control given number of police groups. All looks fine until things start going wrong and and epidemic starts spreading. The epidemic turns civilians to zombies and as it spreads you have to take control over it. The move of your troops is slow so you have to plan very well and if possible not to lost them all. Good luck.