404 Riverside Avenue, Eau Claire, WI
You uncover mysteries in dusty libraries and bloody crime scenes. You walk the mean streets of Chicago or hack through the jungles of the South Pacific. You battle vile cults, or recoil in terror at the alien enormities they worship. You follow the clues wherever they lead, whatever the cost in life or sanity. But do you dare to follow...
The Trail of Cthulhu
This terrific investigative game by Kenneth Hite is based on the GUMSHOE system by Robin D. Laws. You'll need a few d6 for this game.