Discover Groningen like never before with the Secrets of Groningen City Game, a fun self-guided city game packed with puzzles, riddles and hidden stories! This GPS-based exploration game lets you experience Groningen while exploring famous spots such as the Martini Tower, the Grote Markt, the Prinsentuin, the Visserbrug and the Museumbrug. Play solo for a personal challenge or together with friends, family or colleagues. During the game...