Despite the warnings of scientists and environmentalists, humanity has failed to preserve the Earth and the day of the great catastrophe happened... The human species migrated aboard gigantic spaceships, towards a new habitable planet: Gloria-6. You are part of the few survivors to have landed on this new planet, populated by ferocious predators and an intelligent species: the Dryans. Your survival depends now on a very powerful source of energy: a crystal called "corracryst"... Steam Defense is a grandiose strategy game, offering solo play or a PvP mode (Player vs Player).