After colliding with asteroids, in 2030, Earth was nearly destroyed. Earthquakes and tsunamis swept away all the cities, and few people survived. Transportation was almost impossible because most of the roads were gone, and tanks with caterpillars became the major transportation system; the shortage of fuel made people develop a solar engine. Within ten years the survivors built four new cities. Your job is Tank Master -- deliver resources safely from city to city, compete with others for jobs, and harvest natural resources to gain victory points.