Blood on the Clocktower is a social deduction board game designed for 5 to 20 players, featuring opposing teams of good and evil characters in a tense narrative setting. Players assume roles in the fictional village of Ravenswood Bluff, where a demon secretly murders villagers each night while disguised among the townsfolk during daylight hours. The game includes a dedicated Storyteller role who guides gameplay using the game's components, managing nighttime phases when characters use special abilities and daytime phases for public discussion and private whispers.

Gameplay continues even after character elimination, allowing eliminated players to remain involved as ghosts attempting to influence the outcome. The game supports late arrivals through the Traveler character role with unique abilities and ambiguous loyalties. Each character possesses distinct special abilities, ensuring no two players share identical roles within a single game session. The core objective requires the good team to identify and execute the demon before evil players outnumber the remaining villagers.

Components are primarily constructed from durable cardboard materials, with the game designed for repeated play sessions without requiring a traditional game board setup. This English language edition maintains the original game mechanics and narrative elements developed by The Pandemonium Institute, focusing on strategic deception, information gathering, and social interaction dynamics. The game accommodates flexible player counts and features emergent storytelling through player decisions and character interactions, creating varied experiences across different play sessions. Setup involves character assignment by the Storyteller and requires adequate table space for component organization and player movement during private discussions.