S. Coleman Charlton (born in Richmond, Virginia) is a game designer was one of the founders of Iron Crown Enterprises and is generally regarded as the principal designer for the Rolemaster and Middle-Earth role-playing game systems. At Iron Crown Enterprises he served as the Editing and Development Manager.
He and along with fellow game designer Pete Fenlon later started Castle Hill Studios, the software company that developed the Catan Online game. Charlton has also been responsible for designing Catan Online and the English language rules development and production for the games such as Pillars of the Earth. He has been a mentor to game designers such as Andrew Parks.
Charlton grew up in Fluvanna County, Virginia, and attended the University of Virginia. He has a PhD in computer science.
He also designed a game called Rock Garden which is included in the box for Zen Garden