Zombie Siege: Last Civilization is a real-time strategy (RTS) game based on the end of the world. Players will take control of a small group of survivors in a post-apocalyptic world where most of the population is mutated and infected with a deadly virus. The virus transforms the infected into a zombie, which will go on to kill anyone in its path. Players will have to fight the hordes of these undead monsters and try to survive as long as they can.

The survivors are left with one option: to gather as many supplies as they can and build a strong military force to protect themselves against the attacks of the zombies. This is the only way to keep the survivors alive and protect the last remnants of civilization. 

In the game, players can build their own city and can join other players to form an alliance. They can also fight against other players or join forces with other players to protect the last remnants of civilization.