Dont know if people know about this
How to get the mask, the same one as the picture
1. Click on the link and choose USA
2. Sign up, fill out the forms ( I think you have to be 18+)
3. Check your email, and click the link
4. Click "My Games" and register a game ( Metro 2033) then skip the retail code.
5. You have your code!!! Redeem it on https://live.xbox.com/en-GB/RedeemToken?