Must say I can't really wrap my head around why you would have such a beefy system for the SteamOS. Its' primary purpose is to stream gameplay from your proper gaming rig so I can't imagine its' specs would be very demanding at all.
May be in the written review but I am surprised offline play and no auction house weren't mentioned here. Those two facts alone may convince me to re-purchase this and actually play through it, also being able to choose your difficulty from the start
eBentl's comments