The Xbox 360 marketing team transformed a 13th century castle, a working mine and an area of the countryside into a warzone based on the Halo franchise.
Copyright: Ian Gavan/Getty ImagesGutenberg Castle was repackaged as a futuristic military fortification, while a mine and military camp were used as explosive battlegrounds.
Master Chief also made an appearance, as well as countless actors, who were used to create an interactive theatrical adventure, giving guests a series of clues to decode in order to prevent a global disaster.
The latest Halo 4 marketing stunt follows the recent release of the Forward Unto Dawn five-part mini-series.
Halo 4 is set four years after the events of Halo 3, marking the return of iconic hero Master Chief and representing the beginning of a brand new saga.
In addition to the single-player campaign, Halo 4 will feature a robust multiplayer offering through War Games, which will take place on the Spartan training ship Infinity and will tie into the game's story.
The game will include downloadable class specialisations for multiplayer, as well as a War Games Map Pass providing access to future DLC maps.
Named 'Best Shooter' and 'Best Multiplayer' during Digital Spy's Best of E3 2012 awards, Halo 4 will be available exclusively on Xbox 360 from November 6 worldwide.
> 'Halo 4' preview: Master Chief's return feels both old and new
Watch a trailer for Halo 4 below: