Trail of Cthulhu is a complete game of investigative horror set in the 1930s based on the work of HP Lovecraft. The game uses an adapted version of the Gumshoe system which offers a laser-like focus on investigation, with characters driven to explore and investigate, even at the expense of their own health and sanity. publisher blurb: The Trail of Cthulhu Player's Guide is all the player's stuff from GUMSHOE Trail of Cthulhu, including the complete Trail GUMSHOE system, character creation, equipment lists, player tips and forms. It weighs in at 99 pages, compared with the potent 248 Ken Hite-ened pages of the full Trail.