The Legend of Zelda: Breath of the Wild.
Honourable mentions: Halo Combat Evolved, Super Mario Bros, Super Mario World, Super Mario 64, Wii Sports
I can't believe I forgot to put Wii Sports in the poll! Argh!
I voted for Super Mario Bros, because it had a hand in saving the industry as we know it. Also, because going from Atari games to SMB was sheer insanity. Most atari games had 2-3 levels tops, and most of them didn't scroll. I remember Pitfall was the same three levels repeating over and over, just getting harder. SMB was revolutionary with its jumping physics, huge amount of levels compared to Atari games, and wonderful music.
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