Metroid, Metroid II: Return of Samus, Super Metroid, Metroid Fusion, and Metroid: Zero Mission were all developed by Nintendo's internal R&D1 division.
Metroid, Metroid II: Return of Samus, Super Metroid, Metroid Fusion и Metroid: Zero Mission были разработаны внутренней командой Nintendo — R&D1 section.