Energy, or Life Energy, refers to the life-force or durability of a being. Metroids are able to draw pure energy from their prey. In Super Metroid and Metroid Prime 3: Corruption, Space Pirates, Galactic Federation Marines, and random wildlife can be found with their "life energy" drained, likely by Metroids. The brittle remains crumble to dust on contact. This gives an indication as to what happens to something with its energy drained. Oddly, in Super Metroid, even a Torizo is found drained of energy, despite being largely mechanical; the only explanation for this is that the Torizo, like the Chozo Statues, must be organic to some extent.

If Samus ever runs out of energy, she will die, triggering a Game Over. To stay alive, she must regularly keep her energy levels charged by collecting Energy Capsules, as well as Energy Tanks to increase her capacity. Depending on the game, she can also fully replenish her energy by visiting Save Stations, Recharge Stations, Navigation Booths, or her Gunship. Her Energy Meter keeps track of her energy levels.

Game list[]

Game Maximum Energy
Metroid 699
Metroid: Zero Mission 1299 (699 on Hard Mode)
Metroid Prime 1499
Metroid Prime: Hunters 799
Metroid Prime 2: Echoes 1499
Metroid Prime 3: Corruption 1499
Metroid II: Return of Samus 599
Metroid: Samus Returns 1099 (1399 with Reserve Tanks)
Super Metroid 1499 (1899 with Reserve Tanks)
Metroid: Other M 999 (99 on Hard Mode)
Metroid Fusion 2099 (1099 on Hard Mode)