The plan: meet at Butterfly Park in Keene and look like you came for the park. You did not. In plain terms: a team spy adventure on foot, with the missions on your phones. If you are the one organizing: the missions give everyone something to contribute, there is no lecture to sit through, and you look very good for finding it. The missions are only half the game. The other half is watching each other, because somewhere along the way comes a mysterious twist. Plan on about 2.5 hours and 4 stops over roughly 1.9 km. It is a game on your phones, not a guided tour: nothing to download, and as many coffee breaks as you like. And then there is that one teammate who is never living down what happened at the third stop. You will have the photos to prove it. Who it's for: friends, couples and families with teens; and private groups, from bachelor and bachelorette parties 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.