Something to plunge you into a nightmare... Unleash Escape Game, a chain of escape rooms based in Bercy, invites you to explore your dreams... or rather your nightmares, with Madness: The Marsh Heritage, a horror-adventure that drops you into a shared vision with your fellow adventurers. A experience loosely inspired by the universe of horror tales by H.P. Lovecraft.
In Madness: The Heritage of the Marsh, players are haunted by a single, eerie dream that lures them back again and again to a ship’s hold, a menacing dwelling, and a woman dressed in black. This shared vision unsettles when Lawrence Williamson disappears, leaving only a mysterious cylinder to listen to on a phonograph. The investigation then pursues his trail across a port city gnawed by the unspeakable, as players seek to understand this nightmare and uncover a buried truth.
Note that this isn’t a traditional escape room, strictly speaking... Instead, it’s an immersive, narrative-driven investigation that unfolds like an escape game, with puzzles and exploration, but also intertwines interactions with actors. Here, you’ll mainly need to listen, observe, and analyze to understand what’s going on and reach the end of the adventure.
The experience, clocking in at about 105 minutes, delivers an intense and sometimes unsettling atmosphere and isn’t necessarily suitable for everyone. You’ll be scared, certainly... and there may be a few jump scares, but storytelling remains the main goal. For seasoned adventurers, then. It also supports 2 to 4 players, is at expert level, and is only playable in French.
In detail, the experience is strongly not recommended for anyone sensitive to strobe lighting effects, to smoke effects and oppressive atmospheres, to fear of the dark, to recent surgery, or to any medical condition that could be worsened by the experience. It’s also highly discouraged for people with severe anxiety disorders, panic attacks, significant phobias, or post-traumatic stress. The experience is off-limits to anyone under 16 or to pregnant women. And of course, you’re not allowed to touch the performers.
A slew of restrictions that should set off alarm bells about the horror woven into this adventure. Should we book at Unleash Escape Game?
Dates and Opening Time
Starts June 1, 2026
Location
Unleash Escape Game
5 Rue Henri Desgrange
75012 Paris 12
Access
Metro, lines 6 or 14, station "Bercy"
Prices
Par personne, équipe de 6 personnes: €31
Par personne, équipe de 5 personnes: €35
Par personne, équipe de 4 personnes: €40
Recommended age
From 16 years old
Official website
unleashescape.com
More information
Sessions at 4:45 p.m. and 7:45 p.m.



















