Dying Light - Bad Blood Free if you own Dying Light

Hey everyone, as you read in the title, Bad Blood is free if you own Dying Light. I’m not sure if this is permanent or limited time but you might as well pick it up if you own the game. I’m for some reason unable to purchase it when i add to cart, nothing shows up. Hopefully, it’ll work for all of you.

Edit: I got it. You don’t go to steam to get it. You go to the following website, sign up if you don’t already have an account, then you will be given a code for the game.