Bioshock Infinite: Downloadable puzzle game unlocks in-game bonuses, is free (with the price of a pre-order)

Bioshock Infinite: Downloadable puzzle game unlocks in-game bonuses, is free (with the price of a pre-order):
Yep, following the footsteps of the likes of Fable II and Hitman:
Absolution, Bioshock Infinite is jumping on the "Here's a little game as
a teaser while you wait for the real thing" bandwagon, with the
announcement of BioShock Infinite: Industrial Revolution.
Source:Google Reader