Once you install the Steam client and login, you'll be prompted to login using your Spellbreak ID. Login using your existing Spellbreak ID credentials, and you'll be linked! All of your existing progress and inventory should carry over and be accessible for the Steam version of Spellbreak!
If you don't have a Spellbreak ID already, simply opt to create a new account and follow the on-screen prompts.
For any issues with account linking or unlinking, please reach out to our support team who can help you out!