Carl Sanford Joslyn "Sandy" Petersen (born September 16, 1955) is an American game designer.

He worked at Chaosium, contributing to the development of RuneQuest and creating the acclaimed and influential horror role-playing game Call of Cthulhu.

[10] Romero also credits Petersen with coming up with the title for the Hexen expansion Deathkings of the Dark Citadel.

When Quake was reformulated as a first-person shooter in late 1995, id removed Petersen from the Strife team to focus on the game.

Lovecraft Historical Society Motion Pictures in the style of a 1930s black and white horror film.

[citation needed] In April 2011[14] he served as the publisher of horror magazine Arcane: Penny Dreadfuls for the 21st Century.

[15] Petersen took a professorship at The Guildhall at SMU in 2009 following the closure of Ensemble Studios, where he taught several courses on game design.

[citation needed] In mid-2013 Petersen led a successful Kickstarter campaign by his company, Green Eye Games, to produce the boardgame Cthulhu Wars.

[17] Green Eye Games also produced the unsuccessful kickstarter Cthulhu World Combat (iOS, Android, Windows, PSN, Xbox Live).

Those books adapt the Cthulhu mythos for those systems to allow for several mythos-based player character options, many monsters, new insanity rules, and much more.

Petersen is a practicing member of the Church of Jesus Christ of Latter-day Saints, but sees no conflict between his faith and his design of games involving Satanic elements.