Most of you know Trials HD as the punishingly difficult 2D racer on Xbox LIVE Arcade – but buried deep within the impossible jumps and the incredible physics puzzles is something far more elusive – a riddle. A fiendish riddle that would make Da Vinci dribble. In this one-of-a-kind feature Kotaku reader, and Trials HD obsessive, FatShady breaks down this incredible puzzle and speaks to the creators of the game to try and uncover the intriguing mystery that is… The Trials HD Riddle.