This is going to be a treat. GURPS Horror: The Madness Dossier is a campaign setting by Ken Hite for, obviously, horror campaigns: the basic concept involves alternate pasts, monsters from same attempting to bring that past back through neurological-memetic hacking of our very brains themselves, and the benevolent government conspiracy trying to stop them. It was part of the last Third Edition GURPS Horror sourcebook, and I have always wanted to see the concept expanded into something a bit meatier. I look forward to reading it; if you like GURPS or horror gaming, you probably will too.