Silver Credit

The Silver Credit is a type of Bonus Credit introduced in the New Play Control series and Metroid Prime Trilogy; they are obtained in Metroid Prime and Metroid Prime 2: Echoes by obtaining either a Chozo Artifact, Dark Temple Key, or Sky Temple Key, defeating some bosses, obtaining 50 or 100% logbook entries in Prime, or 100% items in Prime. They are used mostly to buy from the Soundtrack Gallery, though two are required for the Fusion Suit.