Metroid

A potentially dangerous creature, the Metroid, is stored deep inside the planet Zebes, and you, space hunter Samus Aran, are sent to destroy the aliens that seek to weaponize it. You explore the various areas of Zebes by platforming and shooting down the enemies swarming its corridors (or by freezing them with the Ice Beam weapon upgrade). When destroyed, foes randomly drop health balls (and missiles, once you’ve acquired the capacity to carry them).