Last Fortress Underground

Game description:

It's a dark hour for the entire human civilization. Zombies are marching across our planet and turning cities into dust and their dwellers into the same mindless creatures. If you don't want to share that grim fate, you have to fight for your survival! Unite with other people who have still retained their human face and build a mighty fortress that will help you fend off waves of zombie attacks. Collect resources, make sure you have enough weapons to protect yourself and don't leave hope to find an antidote!