Role-playing game system
set of game mechanics used in a role-playing game
Generic Universal Role Playing System
System Reference Document
D6 System
Fate
HERO System
dK system
Cortex Plus
Cortex System
Powered by the Apocalypse
Storytelling System
Basic Role-Playing
Interlock System
Amazing Engine
d20 System
d20 System
EW-System
generic role-playing game system
Phoenix Command
GUMSHOE System
True20
3D&T
3d20 system
CODA System
Mayfair Exponential Game System
One Roll Engine
SAGA System
Savage Worlds
Fudge