Lamp's Light Sanitarium is fully compatible with the 5th edition of the world's most popular tabletop roleplaying game. Within the walls of Lamp's Light Sanitarium, you will find all manner of medical marvels. The sick are healed, the lame walk again, and the mad regain their senses... but the cures and miracles hide a horrifying truth. Are your players ready to uncover it, and risk becoming patients themselves? Within this book you'll find everything needed to add gothic horror elements to your 5e game, including chapter dedicated to helping you seamlessly incorporate the sanitarium to an existing campaign. New content includes comprehensive optional sanity rules that incorporate both roleplaying and mechanical crunch. A sprawling estate of nearly 100 rooms, beautifully illustrated and fully described in six ENnie award nominated maps. Two ready-to-play adventures will get your group started. The adventure hooks, story arcs, campaign ideas, and evocative NPCs, creatures, and esoteric items will keep your players guessing throughout it all.