DO CHATBOTS DREAM OF ELDRITCH BEASTS? What happens when an algorithm is trained on data corrupted by cosmic evil? ALChat is a real-time data-mining generative AI with a malign intelligence. Just as a diffusion model destroys data to create images, ALChat murders the living to create new synthetic life. In this modern Call of Cthulhu scenario, the investigators must solve the mystery by navigating a rapidly shifting metaverse, investigating and weathering online flame wars, and delving through the shadows of the deep web. They will face AI-generated horrors and avatars of the dead brought back to life. Will they find the answers that they seek before their world is forever altered by machines learning from the Mythos?