HiddenCity is a company that offers immersive, treasure hunt-style experiences guided by your phone. Form a team of 2-6 players and embark on story-led adventures across the city, solving clues and interacting with characters and the physical world. These adventures, which last 3-4 hours, are set in various locations around London and include breaks at pubs and cafes. HiddenCity provides a unique blend of games, exploration, and real-world interaction, offering Christmas-themed editions during the holiday season. The company emphasizes flexibility and customer satisfaction, allowing for refunds and date changes as needed.