Nobody in Bismarck suspects the tourists taking selfies. That is exactly what HQ is counting on. In plain terms: a team spy adventure on foot. The sights are nice. The real entertainment is your team: the huddled debates, the plans that almost work, and the one person who takes it far too seriously. Some missions need a sharp eye, some need a little nerve, and some need everyone talking at once. No puzzle skills required, just a sense of humour. Expect a mysterious twist along the way. Take it slow and stop for coffee: over about 2.5 hours, 4 stops and 2.1 km on foot, the mission waits. It is played on your phones, not a guided tour, with nothing to download. Back at HQ, your mission report is filed under 'surprisingly competent'. You take home the photos to prove it. Who it's for: friends, couples and families with teens; and private groups, from bachelor and hen nights to work teams and active over-55s. Note: book any day as a private team of 1 to 8. Bigger groups play as several private teams.