Unfortunately, no. There is currently no way to reset your password unless you have an e-mail address registered. Nobody can assist you either, we cannot reset your password for you, as we have no way of verifying your contact information.
If you have forgotten it and you haven't registered an email address, there is nothing you can do. So, if you still know your password, go register an email address with your account right now. It is quick and easy, plus you get a shiny trophy!