World City Trail is a digital, outdoor escape and guided game. It is an interactive way to explore the city, as it combines a fun of treasure hunt with a sightseeing tour of the city. It supports 5 languages. Guided from the smartphone, either online or offline, players make their way through the city, following the route from one point to another, searching for answers and solving clues. A perfect activity for large or small groups of tourists or locals, experienced travelers, couples and families with children. A scaled help system is used by our offline application, so every riddle can be accessible to all. Explore the city and the local history through an interactive and unforgettable game.