Amazon apparently now has an Indie Store, and is running a special. By any Indie (or non-Indie game that they decided to toss into the list) and get 3 free games. This week it's Dynasty of Dusk, Huntsman: The Orphanage, and the The Curse of Nordic Cove.
New set of free games on June 11th, and the total offer is good till July 17, 2013.
Amazon Indie Games
Edit: Hotline Miami is $5, and Brutal Legend in is the list for $7.
Edit #2: The Brutal Legend/OST Combo is $9 (regular price on Steam is $25), so I recommend getting that one instead of the game only deal.
Edited, Jun 6th 2013 9:19am by Shaowstrike