This was a bonus key from Fanatical's little Spin to Win thing they are doing. Spend a certain amount and you get a spin to win a prize. From discounts, to games, to even money on your account it would seem. I got two spins. One gave me a 10% discount and the other gave me this game. Since I already have the game. Why not just put it up.

So there you go.

Happy Gaming Everyone!