d20 System

The roleplaying system which first appeared in Dungeons & Dragons 3E.


Copyright Details

Open Game License

The term 'd20 System' is a trademark of Wizards of the Coast.


  • 13th Age'This is the home of the 13th Age / Archmage Engine system reference document. It contains all the open content from the 13th Age RPG – the Archmage Engine.'
  • Alchemy SystemA modified d20 game set in its own universe.
  • Animalball MeleeA simplified d20 System for gladiatorial combat.
  • Basic Fantasy Role-Playing GameA fusion of Basic D&D with D&D 3E to create a simple, light-weight game.
  • Blue RoseA d20-based RPG.
  • ContagionA free wargame.
  • Core ElementsA distillation of the d20 System in just seven pages.
  • d20 AnimePlay magical girls, sorcerers and mecha pilots using everyone's favourite system.
  • d20 ModernModern role-playing, from occult investigation to special ops and anything in between.
  • d20 Open Mass Combat SystemA free wargame.
  • Dan's Diminutive D20Quick and easy d20 role-playing.
  • Dungeons & Dragons 3EThe third edition of the world's most popular roleplaying game.
  • E6The game inside Dungeons & Dragons.
  • Microlite20A simplified version of the d20 System.
  • MULRAHAn RPG that has undergone considerable changes in recent versions.
  • PathfinderA role-playing game based on Dungeons & Dragons 3.5.
  • PCGenA character generator for the d20 System.
  • Perfect20A variant on D&D 3e.
  • Prometheus SRDAn open version of the character creation and advancement rules from Dungeons & Dragons 3E.
  • Raven Crowking's Fantasy GameRaven Crowking's reworking of Dungeons & Dragons
  • Simple 20A simple d20-based RPG.
  • SpellchromeA classless version of the d20 System.
  • Sweet20Bringing indie sensibilities to the d20 System.
  • Tech NoirA cyberpunk game that uses a d20.
  • True20A d20-based RPG.


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