The Secret Service Entrance is a historical escape room at the top of Het Palthe Huis, the 17th-century merchant house of Museum Oldenzaal — the monument itself is the setting. The story takes place in 1980, at the height of the Cold War: as secret agents, players unravel a chain of mysteries in the struggle fought behind the scenes by spies and submarines. The room is a civilian initiative from Beeldbouw, AssortiMens, Twente University, and the Oldenzaal museums, which explains the low fixed group rate of €60; booking is by email only with 48 hours' notice. To be honest, the online review base is practically zero — no escapetalk mention or quotable player reviews — though recurring Social Deal promotions suggest steady local demand. Note: the room is accessible via a steep staircase and therefore not wheelchair-accessible.