Your mission, should you choose to accept it: 2.5 hours in Exeter without blowing your cover. In plain terms: a team spy adventure on foot, with the missions on your phones. The sights are nice. The real entertainment is your team: the debates on street corners, the plans that almost work, and the one person who takes it far too seriously. Every mission was designed by HQ. GHOST knows that. Your team is the variable neither of them planned for. There may or may not be a double agent on your team. Plan on about 2.5 hours and 4 stops over roughly 2.5 km. No guide, nothing to download, no umbrella to follow, and as many coffee breaks as you like. You leave with your cover blown, your cheeks sore from laughing, and photographic evidence of both. 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.