Act natural. You are just a few people meeting at the Pierce Bridge in Concord. Definitely not spies. In plain terms: a 2.5-hour team spy game on foot, played on your phones. No guide means no one to impress and no one to blame. Just your crew and 2.5 hours of increasingly bold decisions. You will decode messages, photograph evidence, and keep a straight face in public. No experience needed. There may or may not be a double agent on your team. About 2.5 hours and 4 stops over roughly 1.4 km. Your phone is your handler and your only witness, and there is nothing to download. You go home with photographic evidence, several new in-jokes, and a firm group agreement that none of you were ever spies. 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. Book a private game for 1 to 8 players on a date you choose; a team of one works too. Bigger groups play as several private teams.