M18: Hightower is the eighteenth mission in Metroid Prime: Federation Force. Shortly after the previous mission, in which a Metroid-breeding facility was destroyed, the Federation Force return to Talvania in order to hit the Space Pirates at their headquarters. The facility is beneath a gas pocket as the Pirates are not affected by the gas. To destroy the entire installation, the Federation Force must install and guard a Drill that will create a hole in the ground. Then, they will drop a bomb in the hole that will destroy the base.