From the Skirmisher Publishing website:
The stars are right for Cthulhu Live 3rd Edition, a completely revised, expanded, and updated version of the acclaimed live-action roleplaying game based on the horror tales of H.P. Lovecraft. This newest and best edition of Cthulhu Live includes a richly detailed and uniquely playable rules system that incorporates 12 years of best practices and refinements from hundreds of gamers worldwide. Features of this self-contained game include: All-new rules for skills, combat, Sanity, Magic, and Psychic powers. Extensive information on organizing events, stagecraft and special effects. Guidelines on role-playing Outsiders tainted by the touch of the Mythos. New and improved photographs, graphics, and other images, including works by renowned Cthulhu Mythos artist Richard Alan Poppe. And much more!