I just came across a pay-what-you-want deal. Just pay a minimum of $1.75 which covers payment processing fees and download bandwidth.. Anything you pay on top of that is counted as a donation to the developer. [LINK]
The game is called Inside a Star-Filled Sky, " an infinite, recursive, tactical shooter for one". Here is the link to purchase the game as well as a video of some gameplay. It looks pretty fun, I'm picking it up after I post this.
Inside a Star-Filled Sky <- Click here for the game website.