“…The LBG Secrets of the South (SotS) is a game created for the promotion of meaningful social interaction in public space and has been validated with both adolescents and adults in both Rotterdam and the Hague, the Netherlands [17,18,39,42]. It is a game that proposes gaming activities (named challenges) spread across the city, and these activities require different sort of actions to be solved: Quizzes with open and closed answers, taking pictures and voting on other players' pictures, doing physical activities together in a group of players (e.g., playing music or football in the middle of the street), or performing given actions within a time limit [18,36,41,62].…”