The Innsmouth Papers
The Innsmouth Papers is a Lovecraftian letter-larp: a roleplaying game of Lovecraftian horror which you play by writing letters to one another. Together you will tell stories of investigation¸ exploration¸ unease¸ horror¸ and madness. At the end of it all¸ you will have a collection of letters as a physical reminder of this story.
This book includes advice on safety and improvising content¸ as well as simple rules for character creation and writing letters aimed at producing Lovecraftian stories.
You will need at least two participants¸ and if you have more than two¸ someone to act as postmaster¸ a coordinator who sets up initial contact lists¸ manages safety¸ sets expectations¸ and optionally introduces new elements when things seem to be fading.