MultiPlayer: yes
Platform: PC
Publisher: Bethesda Softworks/ID Software
Languages: Multi-Language
Release Date: 7 Oct 2011
You can get the Anarchy DLC separately (region free) only for $12.99
http://www.ultimatumgamekeys.com/en/game/buy-cheap-rage-anar…
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The official word from Valve is that these sites sell illegitimate keys and using said keys may cause the game to be revoked from your account or the entire account could be completely banned.
If you have purchased any keys from this seller I suggest opening up a PayPal dispute informing them that upon contacting valve you have found out that this seller is selling illegitimate keys.
PS: You should also open up a ticket with steam support explaining that you brought a key off them.