We've reloaded the treasure hunt for stag parties. It's got everything: trivia, pub stops, photo tasks, and a bunch of dares and challenges that will bring out your inner joker. Race round Derby's best bits, have a couple of cheeky pints and see who can get to the finish point first. It's run off your smartphone and the app includes special features like live maps and a real time leaderboard so you can see what the other teams are up to. Take a team selfie and get in the game.