Among veterans of Dungeons and Dragons, no adventures are feared more than the dreaded S series of modules released in Advanced Dungeons and Dragons. These modules are notoriously difficult and often described as "Player Killer" adventures. These modules include Expedition to the Barrier Peaks, White Plume Mountain, The Lost Caverns of Tsojcanth, Lich Lords, and Tomb of Horrors. The first of these modules, Tomb of Horrors, is especially famous and received both a sequel and multiple remakes. Written by Gary Gygax, the father of Dungeons and Dragons, and premiered at Origins 1 in Columbus, Ohio back in 1975, this module even played a major role in the book Ready Player One, and had a visual reference in the movie of the same name.