No, that was an error, they are just giving away a (DRM-Free?) mac version of the game. From their forums:
"Sorry guys we don't have steam codes available for Back to the Future.
The main page was an error. It's been corrected.
Kriana - Staff"
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thought some of you might want to know Macheist is giving away back to the future Episode 1 for windows and mac (or at least thats what i read) if you have an iOS device and download the machesit agent app.
Would love to get the game, sadly the app doesn't suppor Iphone 3g.
enjoy guys.
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