As natural resources dwindle and gargantuan monsters begin to attack civilisation, mankind retreats behind the walls of their city strongholds, bolstering defences and developing new weapons to repel the constant attacks. Bring your rookie crew to heel, step up to the plate and defend the city against the monster threat.

Put your strategic expertise to the test: use the innovative rotational district system to change the arrangement of the city, and prepare for the counterattack however you see fit. Manage your resources, expand your arsenal with research and development, and recruit new characters to your team. Command the last bastion of humanity in the fight for survival!