I tried to take most of my inspiration from the original novel. Charly Krank, from Chaosium also gave me the escape from Innsmouth book for the Call of Cthulhu RPG, edited by Chaosium : it s a great source of ideas. Charly is the guy who convinced me to stop making gloranthan games and start to make a Cthulhu one. I should post the rules I use very soon : they re being proofread by an english friend right now. They should be posted late tonight or eventually tomorow evening.