Carl Sanford Joslyn Petersen (born September 16, 1955 in St. Louis, Missouri) is a game designer and video game designer who wrote Chaosium's game Call of Cthulhu in 1981. From 1983-1988 he participated in nearly all of Chaosium's products as developer or editor. From 1988 to 2009 he designed video games, and was on the team of such successful games as Civilization, Doom, Quake, and the Age of Empires series.
In 2013 he returned to the tabletop realm with the successful kickstarter project Cthulhu Wars.
He is now founder of Petersen Games, and in addition to the Cthulhu Wars game line, has designed the Orcs Must Die board game, The Gods War, and upcoming projects.
- Sandy Petersen fan