It doesn't seem that Steam has any means of actually distinguishing between the "Kickstarter editions" that Obsidian advertise and "Standard pre-order editions" that everyone gets. When I redeemed by backer key on Steam, it definitely only returned the standard Hero edition pre-order.
So however the backer exclusive items and achievements are going to be tracked, it definitely doesn't seem to be tied to our game keys in any shape or form. Maybe it will be additional DLC codes that haven't yet be implemented.
Getting the feeling that Obsidian may have done a slight plan change at some point and made the backer items apply to all pre-orders, then forgot to correct existing information and descriptions of what the 'Kickstarter editions' actually include to reflect the change in plan.... or maybe they forgot and are being quiet because they're trying to find out who to point the finger at and flog over the weekend.
Edited by Tikigod, 26 March 2015 - 02:56 AM.