France's largest overnight escape game
Les Granges
de Béthencourt
« Stone — the timeless backdrop of a living play. »
A 650 m² estate. Fourteen rooms. One night to unravel the mystery. By morning, you'll know — or you won't.
The game
One night in a Northern French estate.
650
playing m²
14
immersive rooms
5–7
hours of play
01
night, dinner, dawn
The setting
Northern France's
heritage woven into every puzzle.
Caudry lace, Cambrésis breweries, Matisse's countryside. A geography that enters the plot, room after room.
The experience begins at dusk. You're welcomed, you dine, and night falls. For five to seven hours, you cross the thresholds of an estate that thinks, feels, and keeps its secrets. By morning: a coffee, a roof, and the memory of what you saw.
Game design: Chasseurs de Mystères, a French association of game designers (Joyeuse, Ardèche). Game delivery: mid-September 2026.
The roadmap
Three eras, one place.
B2C opening
The overnight escape opens its doors. Private sessions for groups of 4 to 12. Monthly bookings.
Study days — B2B
Seminar format for up to 150 people. The estate opens to companies, schools and cultural institutions.
Residential seminars
Eighty beds. France's first themed seminar residence — full immersion, several days at a stretch.
The team
The people holding the lantern.
Agathe Dogué
Director
Guillaume Aubry
SEGB President
Grégory Bendrihem
Creator
Robine Framery
Game Master
Chasseurs de Mystères
Game design
The campaign
Be part of the adventure
from day one.
Ulule launch on Monday, May 18, 2026.
First perks, opening-night seats, places reserved for early backers.