THQ has announced the launch of the official Frontlines: Fuel of War web riddle, an opportunity for you to find 10 hidden passwords around the web and qualify for a trip to Air Combat USA (fly a real plane and fight your friend), plus a free copy of the game. You can also increase your chances of winning by inviting friends to join your squad (up to 5 friends). If one of your teammates wins the grand prize, you do too. Frontlines: Fuel of War, the first product from its internal developer Kaos Studios, founded by veterans of Trauma Studios, creators of Desert Combat and designer of key technologies for Battlefield 2, will be available for PC, Xbox 360 and PS3.