You will receive three emails: October 31, November 30, and December 18. (Hunting Annabelle’s release date.) Each email will contain an installment of an original story by Wendy. Each will offer you the chance to choose a path for the main character, and, should you choose correctly, an entry into a giveaway.
If you don’t sign up before October 31, you will have to wait until the next game, which starts in January.