The game is also available on Desura: http://www.desura.com/games/hard-reset
This version however is DRM Free. Comes with an Artbook and Soundtrack. Problem is - I've downloaded it (using Desura, not downloadable package [may be different?]) and this version doesn't include Exile DLC (unlike Steam version). This way, unless there is a Steam key that comes with purchase of the game on Desura - this would be mean, Desura offers an inferior version, due to lack of mentioned DLC.
I bought my Hard Reset in a bundle and I can't verify that - IndieRoyale came with Steamkeys, which were bound to my Desura account the moment I registered bundle on Desura - it's not certain if a normal purchase of Desura would result in obtaining such Steam key, as well.