The Armitage Files presents a boldly innovative way to generate blood-chilling adventures for your Trail Of Cthulhu investigators. Players seize on clues presented in the ten mysterious documents. They choose which leads to track down. The Keeper, using clearly broken down step-by-step techniques introduced in this volume, improvises suitably mind-blasting mysteries in response to their choices. Weave these together into an epic campaign of madness, dread and danger..