Review and Game Master tips for the 1989 classic adventure "Bad Moon Rising." It's got an awesome story, with a beautiful twist, but a few issues keep it from being a great adventure.
You can buy it here: http://www.drivethrurpg.com/product/1680/The-Great-Old-Ones?term=the+great+old+ones&test_epoch=0&it=1&affiliate_id=1017650