Yeah, I know everybody and their brother is working on or has put together a retro-clone of one of the editions. I never started working on a straight up retro-clone but I have helped out with a few things on a neo-clone rpg, Back to the Dungeon! What makes it different? Well, it obviously has a place on the D&D family tree but it does not stick as closely to the SRD as other games; several sections have been re-worked. Back to the Dungeon emphasizes the free-wheeling nature of the earlier days of the hobby with an updated rule set. One of the biggest differences is the special effect granted when you roll a natural 20 in certain circumstances. For example, a cleric will heal some damage to allies and damage undead within a certain radius. Each class has their own unique special ability that is triggered in this fashion. The rules are presented in an old school ‘zine format.