Go on an interactive city discovery experience across Porto at your own pace, off-the-beaten-track, and take breaks as you wish. All the information you need for your adventure will be sent in an email. Your challenge starts on Praça de Carlos Alberto and the game ends near Praça de Lisboa. You will need to solve 14 riddles from a web application in your phone’s browser. Each riddle takes you from one hidden location to the next. You will unlock local recommendations and fun facts, as well as the history of the city. Discover spots in Porto that most locals don’t even know about. See popular sights from a different angle, literally. Find charming streets, local galleries and cafes, curious statues, and wicked art. There are a few rules for the games and you will be reminded of them before playing. Every riddle is made up of cryptic directions and a question. To answer the question, you can try as many answers as you like with no penalty for doing so. If you are stuck, you can ask for a hint. This does lead to 10 minutes of penalty time, increasing your overall completion time. If you are really lost, you may skip a riddle. But why would you? It’s less fun and adds 20 minutes of penalty time. There’s no time limit to completing the game.