Sandy Petersen has written at least 22 books. Their most popular book is Call of Cthulhu: Horror Roleplaying with 6 saves with an average rating of 4⭐.
Series
1 primary book2 released booksCall of Cthulhu RPG is a 32-book series with 1 primary work first released in 1981 with contributions by Sam Johnson, Dave Blewer, and 48 others.
Series
1 released bookCthulhu-Rollenspiel is a 4-book series first released in 1981 with contributions by Sandy Petersen, Yurek Chodak, and 9 others.
Series
1 released bookGloranthan Classics is a 2-book series first released in 1979 with contributions by Greg Stafford and Rudy Kraft.
Series
2 primary booksGuide to Glorantha is a 2-book series with 2 primary works first released in 2014 with contributions by Greg Stafford, Jeff Richard, and 7 others.
Series
1 released bookL'Appel de Cthulhu is a 6-book series first released in 1981 with contributions by Sandy Petersen, Yurek Chodak, and 11 others.
Series
1 released bookRuneQuest 3rd Edition is a 3-book series first released in 1985 with contributions by Greg Stafford, Sandy Petersen, and 3 others.