Steam Castle - Steam Castle is the last fortress of hope for Humanity. After fighting a cruel and losing war against the Mechanitrons, the army of Steam Disciples have fallen back to Steam Castle. The Mechanitrons are not holding back and is sending their whole fleet of mechanical air balloons and air drills. Use advanced steam compression technology to fend off as many Mechanitrons as possible before the fortress falls. This is Humanity's last stand, make it count.