An Advent calendar for couples like no other!
🧩 24 interactive riddles to solve together by scanning QR codes.
🎁 The perfect gift for fans of escape games, mysteries, and shared adventures.
🚂 Embark on a mysterious journey through the polar night.
💬 Playable from age 16 and up, thanks to an on-demand hint system.
❤️ Around 15 minutes of gameplay per day for a fun and immersive moment of connection.
December 22, 2025.
You are two secret agents sent on a mission aboard the Bifröst Express, Scandinavia's most prestigious train. Your objective: discreetly monitor the passengers and thwart any suspicious activity.
But as the days go by, doubt begins to set in.
Strange incidents, unsettling encounters, signs from beyond…
Something is stirring in the polar night.
In this immersive adventure, each day will challenge you with a new riddle.
Observation, logic, deduction: will you be able to unravel the mysteries of the Bifröst Express before it’s too late?
An interactive Advent calendar blending suspense, investigation, and Nordic mystery.
Play on your smartphone, follow the Northern Lights… and trust no one.
Important information:
This book requires the use of a smartphone (to scan QR codes) and an Internet connection to play. No app needs to be installed — you'll access a web-based interface directly after scanning a QR code.