Operation Grefsenkollen 1945

2 hours 
2 km/1 mile
1-4 players per group
€50 / NOK 499

Based on: Case F

Difficulty: Medium

8+ years recommended


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365 Days a year


Grefsenkollen, Oslo


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


It is an extremely important and very dangerous mission for all involved.


Can you handle the task?


You will be taken around the beautiful surroundings around Grefsenkollen, where you will face various challenges and puzzles in order to be able to solve the task.


At the end of the trip, you can open the last envelope and find out if you have completed your mission and at the same time read about the real events on which the task is based.


Good luck, you may need it!

PLEASE NOTE: This mystery is only available in NORWEGIAN!

Not barrier-free
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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: contact@solveamystery.net

Pick up point


Akershusstranda 23

0150 Oslo

Mon - Fri 11-17

Sat 11-16

Sun closed

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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 will contain everything you need to complete your investigation.

Each chapter contains new tasks and challenges that can shed further light on the case.

The more points you earn along the way, the more time you are given at the end to discuss your findings and to reach a conclusion. Remember not to open the final chapter before making your decision.

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