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Operation Grefsenkollen 1945

2 hours 
2 km/1 mile
1-4 players per group
€25 / NOK 285 per person

Based on: Case F

8+ years recommended



365 Days a year


Grefsenkollen, Oslo


In 'Operation Grefsenkollen 1945' you are taken back to the Second World War, where you are a member of a Norwegian resistance group and have a secret mission.


It is extremely important and very dangerous for everyone involved, but can you carry out the mission?


You will enjoy the beautiful surroundings around Grefsenkollen, where you will face various challenges and puzzles in order to accomplish the mission.


In the end, when you have completed your mission, you can read about the true historical events which inspired the mystery hunt.


Good luck, you may need it!

PLEASE NOTE: This mystery is only available in NORWEGIAN!

Not barrier-free
Explore grefsenkollen with a mystery hunt


Go to the pick up point, which is a short walk from the starting point, to collect your mystery. Begin the game any time you want at the starting point indicated on the envelope.

The mystery takes place outside and is a private group activity, no third party members or additional players are involved. It is possible to play the game in larger groups, go to FAQ for more information or send an email with your request to:

Pick up point

The exact location will be sent via email after purchase












**You have to collect your mystery at the pick up point within 3 months after purchase, after which you can solve your mystery any time you want.**

Open Hours:

Mon – Fri: 11am – 5pm

Sat: 11am – 4pm

Closed on Sunday public holidays

A unique sightseeing experience
Solve the Mystery hunt at Grefsenkollen
The Mystery Walk

This true crime mystery is based on an actual event from World War II.

You will solve exciting riddles and tasks together as a group whilst exploring the beautiful area of Grefsenkollen.

The envelope contains everything you need to complete your mission.

Each chapter contains new tasks and challenges that lets the story unfold.

The more points you earn along the way, the more time you are given at the end to accomplish the mission.


If you succeed, you will have completed a task that everyone thought was impossible.

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