A tower with electromagnetic rails and the last to unlock. The Rail Gun has an outstanding range and penetrating damage with a cost of rate of fire. It is the smallest defense and can be hidden behind a Lvl 5-8 Monster Locker and Lvl 3-4 Hatchery. However, it does not attack airborne monsters, making it vulneruble to Destronauts, pairing it with anti-air towers will make good work to them. It's a good idea to surround it with Silos and optionally, Town Hall to protect them as the attackers will damage the Silos while the Rail Gun kills them.