Capcom promised more details soon on the retailer-specific bonus maps that players will receive for pre-ordering Resident Evil 6, and now those details are here. A new post on the Capcom-Unity site confirms that the three maps, available with GameStop, Best Buy, and Amazon pre-orders, are part of the returning Mercenaries mode.
Unlike the story-driven campaign portion of the game, Mercenaries mode -- first introduced in RE3 -- is a points-based challenge in which players fight against the clock as they take out as many enemies as possible. That basic idea is supplemented with trappings like combo chains and time bonuses to keep players coming back for more.
GameStop pre-orders of Resident Evil 6 will come with a map called The Catacombs. It's a dark underground location filled with both zombies and booby traps. You can see one of them right there in the pic, a spiked floor trap. It should be fun to impale zombies on that thing.
Amazon pre-orders come with the High Seas Fortress map. This one is much more of an outdoor location, with the endless parade of zombies spawning on the deck of a massive aircraft carrier. The action also extends inside the ship, covering both the wide-open hangar areas and the military ship's tight corridors.
Finally, Best Buy pre-orders come with the Rail Yard map. It's a "multi-level stage" with fighting areas set everywhere from inside parked trains to the roof of the facility. The Capcom post notes that the October 2, 2012 release date applies to the Xbox 360 and PlayStation 3 versions of RE6. A PC version will be coming as well, but there's no date set yet and it's not clear if or how these pre-order bonuses will apply to that version.