Humble Bundle organizers have launched the first in a series of weekly sales offering high-profile indie games for a price of your choosing ($1 minimum).

First up is Supergiant Games' Bastion, which is available as a DRM-free download for Windows, Mac, and Linux. Pay more than the average purchase price (currently just under $3) and you'll also receive a downloadable soundtrack, along with a digital art collection, sheet music, and ringtones.

The Humble Store offers an additional purchase tier featuring a collection of promotional merchandise. Pay $25 or more and the Humble Store will ship you a package that includes a Bastion bandanna, a Bastion soundtrack CD, a Bastion postcard, and another postcard promoting Supergiant's recently announced Bastion follow-up Transistor.