Defend The Web - World of Peacecraft / Realistic
Navigate to https://defendtheweb.net/extras/playground/real/1/email/. In your email Trash folder is an email from uStudio with a password in plaintext. There is an activate account email from World of Peacecraft in your inbox which contains a link to http://www.wop.com/activate. Simply enter the password in the form, and the challenge is solved.