Is Metroid Nintendo's only real "adult" franchise? : Games - Metroid adult games
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All games in the Metroid series excluding Metroid Prime Hunters (though featured as . The Omegas and Zetas are together the adult phase of the species. Adult Mode (オトナむき Otona-muki) and Child Mode (コドモむき Dream) are game settings exclusive to the Japanese versions of Metroid Fusion and Metroid:.