Sandy Petersen is the creator of ‘Call of Cthulhu,’ the popular RPG inspired by the works of the fantasy author, as well as the designer of the famous video game ‘Doom’
My group has been playing a CoC campaign for around 6 months and it's fantastic. Very different from D&D, adventuring seems to be a process of slowly losing your sanity. We've been jaunting around New England in a Rolls Royce, running into strange townfolk and occasionally inexplicable phenomena. We recently found a telescope that can sort of take over your mind if you look through it. Lots of Lovecraftian props - crystals, lenses and prisms with odd properties, NPCs who have gone insane, medical anomalies... and the style of play is very different from D&D - very little combat, lots of investigation.