A 'retroclone' duplicates the rules of an old game (game rules are not copyrighted) so others can create supplements for the original game without violating copyright.


  • Dark Dungeons • Dark Dungeons is a retroclone for the Rules Cyclopedia.
  • ZeFRSA retroclone of TSR's Conan RPG.

Original Games

  • Marvel Superheroes RPG: 4C System.
  • 0E D&D: Swords & Wizardry.
  • 1E D&D: OSRIC.
  • Basic/Expert D&D: Labyrinth Lord.
  • Rules Cyclopedia D&D: Dark Dungeons.
  • The Fantasy Trip: W&W.
  • DragonQuest: DQ Open Source.
  • Conan RPG (TSR): ZeFRS.