Search for a long-lost relic that holds mystical powers in the Boston Common or recover a highly precious gemstone in Harvard Square with Urban Interactive's city adventures.

Race around the city in this virtual reality game, following clues and solving puzzles, all with the help of an iPhone (provided by the company).

The game is $25 per person for teams of two or three people and $20 for four or more players. Each game takes about 2 hours. Visit www.urban-interactive.com for more information.