Operation Grefsenkollen 1945

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

Based on: Case F

Difficulty: Medium

8+ years recommended


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365 Days a year


Grefsenkollen, Oslo


Operation Grefsenkollen 1945 is based on real events from World War II.
You are members of the Norwegian resistance, and it is your job to carry out a secret mission.

This job is important but very dangerous for everyone involved. Will you be able to carry the mission out?

Good luck - you will 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 at 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 the II World War.

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 about the case. 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.