Systems and their descendants

7 games built on it

• Mindjammer
• Fate Accelerated
• Legends of Anglerre
• The Dresden Files Roleplaying Game
• Diaspora
• Starblazer Adventures
• Spirit of the Century

6 games built on it

• Blueholme
• Basic Fantasy RPG
• Redbox Hack
• B/X Essentials
• Castles & Crusades
• Dungeons & Dragons (4th basic edition)

4 games built on it

• Basic Fantasy RPG
• Castles & Crusades
• 3d20 system
• True20

4 games built on it

• Cepheus Engine
• Traveller: The New Era
• MegaTraveller
• Behind Enemy Lines

3 games built on it

• The Black Hack
• Whitehack
• Swords & Wizardry

3 games built on it

• Danger International
• Justice, Inc.
• Champions

3 games built on it

• 4C System
• Marvel Super Heroes Advanced Set
• Conan Role-Playing Game

3 games built on it

• Avant Charlemagne
• Empire galactique
• Mega

3 games built on it

• Twilight: 2013
• Dark Conspiracy
• Cadillacs and Dinosaurs

2 games built on it

• Honor + Intrigue
• Les Mille-Marches

2 games built on it

• Barons of Braunstein
• Brown Stone Texas

2 games built on it

• Star Ace
• Timemaster

2 games built on it

• Deadlands: Lost Colony
• Deadlands: Hell on Earth

2 games built on it

• Rogue Trader
• Birthright

2 games built on it

• Pathfinder Roleplaying Game
• Pathfinder Roleplaying Game (1st edition)

2 games built on it

• Old-School Essentials Retro Adventure Game
• Labyrinth Lord

2 games built on it

• Usagi Yojimbo Role-Playing Game
• Jadeclaw

2 games built on it

• Portes, Monstres & Trésors
• Mutant Future

2 games built on it

• Aventures merveilleuses
• Le Magicien d'Oz

2 games built on it

• Légendes Celtiques
• Premières légendes : Légendes de la Table Ronde

2 games built on it

• Aliens Adventure Game
• Living Steel

2 games built on it

• Capitaine vaudou
• Cyber Age

2 games built on it

• Masterbook
• Shatterzone

1 game built on it

• OSRIC

1 game built on it

• For Gold & Glory

1 game built on it

• Daredevils

1 game built on it

• Abyme

1 game built on it

• Tenra War

1 game built on it

• Drakar och Demoner

1 game built on it

• Dungeons & Dragons (original edition, 1st print)

1 game built on it

• Sig: City of Blades

1 game built on it

• Tomorrow Knights

1 game built on it

• Dark Champions

1 game built on it

• Timelords

1 game built on it

• Rogue Trader

1 game built on it

• Mayfair Exponential Game System

1 game built on it

• Démiurges

1 game built on it

• No Country For Old Kobolds

1 game built on it

• Dark Dungeons

1 game built on it

• Héros & Dragons

1 game built on it

• Dungeons & Dragons (basic edition)

1 game built on it

• Mazes & Perils

1 game built on it

• Timelords

1 game built on it

• Yurl'h

1 game built on it

• Wastburg

1 game built on it

• Dungeons & Dragons

1 game built on it

• Blood & Honor

1 game built on it

• In Nomine

1 game built on it

• INS/MV Apéro

1 game built on it

• Songbirds 3e

1 game built on it

• Donjon & Cie

1 game built on it

• ROLE

1 game built on it

• Nephilim (1st English edition)

1 game built on it

• Nephilim Initiation

1 game built on it

• Feng Shui

1 game built on it

• Night's Black Agents: Solo Ops

1 game built on it

• Starfinder Roleplaying Game

1 game built on it

• Thou Art But A Warrior

1 game built on it

• Against the Darkmaster

1 game built on it

• High Adventure Role Playing

1 game built on it

• Steve Perrin's Quest Rules

1 game built on it

• Oniros

1 game built on it

• Star Trek: Adventure Gaming in the Final Frontier

1 game built on it

• Starfleet Voyages

1 game built on it

• Other Dust

1 game built on it

• Tenra War

1 game built on it

• Macchiato Monsters

1 game built on it

• Le Donjon de Naheulbeuk

1 game built on it

• Skulduggery

1 game built on it

• Generic Universal Role Playing System

1 game built on it

• SpaceTime

1 game built on it

• Victorian Age: Vampire

1 game built on it

• Macchiato Monsters

1 game built on it

• Starfall

1 game built on it

• No Country For Old Kobolds

1 game built on it

• Drakar och Demoner

1 game built on it

• Roanoke