4 participants

Approx. 90 mins.
per group

The Citadel, Cph K

250 DKK p.p.


Participate in a challenging spy hunt at the protected heritage site “The Citadel” in Copenhagen, where the Danish Defence Intelligence Service is based. In here, an invisible war is fought, where the strongest weapons are information and misinformation. As the strategist Sun Tzu wrote thousands of years ago: ”Know yourself and know your enemy. Then a thousand battles will turn into a thousand victories.”

You must learn from the best and the worst, from the empire’s friends and enemies, who changed the course of history with strokes of genius and failed initiatives. You will be taught the noble arts of espionage, counter-intelligence, manipulation, deception, feints and surprise attacks. Can you break the codes and distinguish true from false? Will you be able to trust your team? And will you dare to reveal the secrets, see through the deception and complete your mission?

The Secret War is presented in cooperation with the Danish Defence.

The Secret War can be played in:

Practical Information

  • You can be 4 to 8 people in one group.
  • On your Mystery Hunt you will need a Mystery Box™ containing materials for The Secret War. You have to pick this up in our office on Grønningen 15 – right next to The Citadel.
  • You complete the Mystery Hunt on your own.
  • We recommend that everyone is sober when you start playing The Secret War.

Frequently Asked Questions

(Outdoor prices pr. person incl. VAT., The King’s Secret and The Secret War)

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Money back guarantee

Mystery Makers endeavour to provide our customers with the best possible products. If you, despite expectations, are not happy with the product, we will refund your payment, also if you have already started using the product. We offer this guarantee in up to 7 days after completion of the event.


Den Skjulte Krig Mystery Hunt Teambuilding Kastellet København


Gl. Hovedvagt
Kastellet 1
2100 Copenhagen

Frequently Asked Questions – The Secret War

Is the Mystery Hunt suitable for children/families with children?

We recommend that children are at least 12 years old and accompanied by adults if they participate in our Mystery Hunt games.

Is the Mystery Hunt also a corporate event, and what about teambuilding?

Yes, The Secret War is indeed very suitable for companies that want an entertaining and different experience! Both the individual employee and your ability to work together will come into play. Contact us for more information at +45 3080 3050 or

What if we are not sure how many people we will be?

If you are in doubt about how many people you will be, please call us at +45 3080 3050 or send an email to

How much does the The Secret War cost?

250DKK per person incl. VAT.

You must be a minimum of 4 people for The Secret War.

Please note that The Secret War is a live event and that bookings are binding.

Are there any restaurants nearby?

We have made a list of nearby restaurants, which are in walking distance from Mystery Makers. The list can be found her.