Greatest Nintendo Launch Title?

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Tough call; Mario Bros/World/64, Twilight Princess, Wii Sports, and Mario Kart World are all great games.

Ultimately though, I gotta go with BOTW; few games have blown me away quite as much, it was what I dreamed games of the future would be like when I was a kid in the 90s, with how a multitude of interactive elements gave rise to almost endless emergent possibilities.