Eidos has signed an exclusive deal to unveil Tomb Raider Underworld at the end of December. An online PR campaign will mobilise in January 2008, with Tomb Raider Chronicles launching a microsite, preview and fact sheet for Underworld. The game is being developed by Crystal Dynamics and will release in 2008 for PS3, Xbox 360, and Windows. The story centres on the Mayan calendar and the brief time frame where portals between the mortal realm and the Underworld dissolve.