PS4 Software Zombie Survival Colony Builder They Are Billions

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Set in a world where zombies have spread and civilization has collapsed, this is a simulation game about the construction and defense of a colony by mankind.
You come to an unimaginable flock of zombies.
Build a colony that can withstand the more intense attacks of zombies and seize the victory of mankind!