One Night One Monster is a tabletop roleplaying game about modern-day occult investigators traveling from place to place and solving mysteries involving strange occurrences.

One player serves as the Lore Master, describing the world and resolving the investigators’ actions. Everyone else creates an investigator, searches for clues, and attempts to stop the horror behind the mystery.

Every adventure is designed to tell a complete story in a single session. All you need to play is the game, friends, and a single twelve-sided die.

• Complete a horror adventure in one night.
• Create an investigator in as little as ten minutes.
• Resolve every challenge with a single d12.
• Investigate mysteries, confront monsters, and risk insanity or death.
• Play any adventure without levels or campaign prerequisites.