DungeonCat
A System Reference Document to play in your mind!
Un pequeño TTRPG táctico sobre combate sangriento
A small tactical TTRPG about bloody combat
SRD's
An SRD for creating journaling games.
A Toolkit For Creating Single-player Exploration Games
Build action packed, illuminated RPGs
An SRD for creating Breathless games.
An SRD for creating narrative TTRPGs with cards, dice, and dramatic turning points.
An Introductory TTRPG Design SRD