Gamepot teamed up with MMOSite, Onrpg and MMORPG to giveaway keys for a free item.
You can read the details on the official homepage.
Anyways Onrpg seem to be the only one actually doing it so. Basically sign up with them and log in(You have to do this first or the page will say you already have a key when you don't)
So do that through
www.onrpg.com once you have your account and have logged into the main page click the Mir 2 Free Items Giveaway and copy that key (Since once you refresh close or whatnot you lose it)
Once you have the key goto
https://pcbill.gamepotusa.com/Events...ampaignFrm.asp log in, fill in the key and pick your character