Luftrauser, by Vlambeer and Devolver Digital is a dogfighting simulator (please God tell me they mean "aircraft" dogfighting and not that other kind) coming to the PS3, PS Vita, and PC/Mac/Linux via Steam. It comes out on March 18. You can download it for $9.99. You can pre-order it on Steam and Humble for 10% discount right now.
You can also pick up the Luftrauser Air Raid Pack, but I think "pack" is the wrong word. For $749.99 you can download one utterly DRM-free copy of Luftrauser AND 100 giftable Steam keys. Of course, with this new found power comes new found responsibilities - namely, the recruitment of other rauser pilots. If Twitter has a better purpose than facilitating mass Steam key giveaways, then I don't know what it is. My Twitter feed is choked, CHOKED I TELL YOU, with Steam key and other code giveaways.
I'm just beyond being surprised by anything Devlolver Digital CFO Fork Parker has his hands in at this point; that dude is simply deranged.