Magic & Mayhem for Heretic is an add-on for Heretic released by Laser Magic. The add-on's file dates on the CD indicate a release of late July 1995. It includes 1,599 levels for Heretic, though there are WADs included on the disc that are essentially custom made Doom levels, such as Doomsday of UAC, converted into the Heretic format (using Heretic's textures, weapons, items, and monsters). The add-on also includes version 5.9b of the Doom-It tool by Chris Badger.