New game with the combined genre of strategic survival, Sandbox, and city-building simulation. Enjoy the simulation with a vast world to adventure with a great number of contents. Build your own economic system to sustain your ideal city of Ratopia. Economically active Ratizens Citizens of Ratopia each own wealth and characteristics. There is no such thing as a free lunch! Supply jobs and services for Ratizens to make all happy. Create extraordinary Policies Make a detailed policy to tax them all! Shouldn't the people all work restlessly for more profit? Create or prevent social disasters with your own policies. Diverse adventures placed Underworld Explore and find the remains of the great old rats. Bring prosperity to the city through great expeditions. Some might wake up new apex predators, but who cares?