In the page's words:

UnboxedTactics offers interactive city rallies in which you experience real cities in a completely new way as an investigator, adventurer or team of agents.
Each tour combines exciting stories with clever puzzles - directly on your own smartphone.
Ideal for team events, school classes, groups of friends or simply as a special leisure experience.

✅ Can be played without prior registration
📍 In over 10 cities in DACH
🔎 With crime, agent and adventure missions