Metroid: HD follows the same storyline as the original.

Metroid: HD adds: • Increased resolution** • Increased frame count for movement animations** • Scrolling backgrounds and foregrounds** • Updated sound effects and music** • File resources for alternate sound and graphics** • New title and ending screen** • Automap** • New secret area in Brinstar** • Pause screen powerup status indicators** • Animated environments • Beam stacking • Saving • Full health on startup • Enemies disappear during door transitions • Improved bomb laying mechanic