M04: Containment

M04: Containment is the fourth mission in Metroid Prime: Federation Force. For this mission, the Federation Force is deployed to Excelcion to capture four Ice Titans for study. This would also help the Federation in retaking their abandoned base on the planet, which was overrun by the Space Pirates.

To capture them, the Marines must lure them into cages stationed around the mission environment. The cages are opened by shooting red buttons above them. When something enters it, the cage will close. It may be necessary for one of the soldiers to enter the cage in order to lure the Ice Titan into it as well. Should they become trapped inside, they are able to shoot a button to escape, at the risk of setting the Ice Titan free again. Once all four Titans are captured, the Marines are called to the extractor. A fifth Titan confronts them along the way, but the Marines are not required to capture it, although doing so results in a points bonus.