Prepare yourself for an online scavenger hunt that's billed as the "ultimate online contest for gamers and puzzle solvers". Prepare for the Xbox 360 X Marks the Spot giveaway. Microsoft has teamed up with Pontiac, Mountain Dew, Zune, Gamestop, EA, Activision, Samsung and others to offer a whole bunch of prizes for their online scavenger hunt. And how it works is pretty simple. Starting Monday, November 5th players will have to scour the internet, using clues found on X Marks the Spot's website, solving gaming related questions in an ultimate effort to find secret passwords with green Xs on them. These X words allow entry into daily and weekly giveaways. Prizes including a new Pontiac G6 Coupe GXP (w00t!). There's goodies to be won, puzzles to be solved and Xs to be discovered ... so, are you up for the challenge?Start exploring here. X Marks the Spot to win. Alguém interessado em participar? A competição começa já amanhã, não sei se haverá restrições quanto à localidade dos participantes.