If you purchase the PC game on WolfQuest.org or itch.io, you will need a Key to register a game account. You can claim it on your download page.
With an itch.io account
Without an itch.io account
July 18 Special Note: If you purchased the game from WolfQuest.org or itch.io in the past few days using Paypal, please see this article.
Note: Customers who purchase the Itch.io version also receive a complimentary Steam key. Check the link in your e-mail receipt or the ‘My purchases’ download page. See the Knowledge Base article "Getting a Steam Key From itch.io Purchase" for more information about that.