343 Industries sure knows how to launch a game. They converted landmarks in the Principality of Liechtenstein a 13th-century castle and a mine for the Halloween event this past week.

Media and fans were invited to participate in this event. Everyone was taking by buys to this secret location then got to enjoy a Halo battle explosions and fake gun fire.

After the “show”, all the guest got to try out Halo 4 before anyone else in the world, check out the video below to see this insane event: