Unlockable: Concept Art
The content below is unlockable in the game. You must use credits earned in the game (of all four varieties) to unlock anything. Listed next to each piece of unlockable content is the number of each credits you’ll need to unlock said content.

B = Blue Credits, F = Friend Credits, G = Gold Credits, and R = Red Credits.

Creatures (I) - 1B/0F/1G/3R
Creatures (II) - 2B/1F/2G/3R
Samus - 2B/0F/1G/3R
Storyboards(I) - 2B/0F/1G/3R
Storyboards(II) - 2B/1F/2G/3R
World (I) - 1B/0F/1G/3R
World (II) - 2B/1F/2G/3R
Unlockable: Music
Battle Theme (GF) - 2B/0F/1G/4R
Battle Theme (Metroid) - 2B/0F/1G/4R
Bryyo - 2B/0F/1G/4RM
Bryyo (Thorn Jungle) - 2B/0F/1G/4R
Gandrayda - 2B/0F/1G/4R
Helios - 2B/0F/1G/4R
In the Cockpit - 2B/0F/1G/4R
Omega Ridley - 2B/0F/1G/4R
Phaaze - 2B/0F/1G/4R
Pirate Homeworld - 2B/0F/1G/4R
Skytown - 2B/0F/1G/4R
Steamlord - 2B/0F/1G/4R
The Corruption - 2B/0F/1G/4R
Title Screen - 2B/0F/1G/4R
Valhalla - 2B/0F/1G/4R