Members - X-COM: Apocalypse

The last battle of T'leth has severely damaged Earth's biosphere. As a result, several self-contained Megalopolis-type cities were proposed to provide habitation for humanity. Follow Mega-Primus, the first of these cities, built over the ruins of Toronto, while fending off new type of extradimensional aliens trying to attack the city through tetrahedron-shaped teleport gates.