Xbox "#HuntTheTruth" by McCann London

Microsoft's Xbox has launched another interactive experience for hardcore Halo fans ahead of the release of the new edition of one of the biggest game franchises in history.

McCann London created the global campaign for Halo 5: Guardians, in which clues are dropped in TV ads, cinema spots and digital and outdoorexecutions that allow users to solve a crossplatform puzzle. The winner will be made into a Halo character. The work was created by Jamie Mietz and Sanjiv Mistry, with production by B-Reel.