I just got the order confirmation, waiting for the steam code! According to the Kotaku post it's a steam code and according to the linustechtips forum its only for US residents.
**In order to actually get the steam code, take the code from your email when it gets sent to you and fill out this form on Nvidias website: http://www.geforce.com/games-applications/pc-games/metro-last-light/deals-promotions **