Right after purchasing you'll receive a link: www.play.lifeisfeudal.com/redeem. Depending on the store used, a link may be delivered by e-mail (don’t forget spam folder), or you will be transferred to a redemption page instantly.
If you don't have a Life is Feudal account, create it by clicking the “Create an account” button and filling in all the necessary fields.
If you already have a Life is Feudal account, authorize it by providing your credentials and clicking “Already have an account.”
After you will log into the website, you will be redirected to the page where you can enter the key and press "Activate"
On the e-mail linked to your account there should be 2 e-mails:
Message from Xsolla will be sent first, later you will receive a second one from Bitbox Team where you can find a link to download the launcher. Now you can log into the launcher and start living in the world of Life is Feudal: MMO.