The Heroic map pack contains three new maps, each presenting a totally different play style. Standoff’s symmetrical valley, with its entrenched bases and fields of boulders is ideal for mid-sized objective and Slayer game types, while Rat’s Nest’s vast, labyrinthine passages bring something quite new to the Halo multiplayer experience – an indoor vehicle paradise, strongly influenced by the Campaign mode ideal for big team battles. Finally, Foundry is the ultimate Forge map – players can edit every single object in this voluminous industrial warehouse, place stairways, walls, bridges and tunnels to create an entirely new play space and build almost any kind of map they can think of. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Warmly crafted, dutifully beautified update of Halo: CE classic multiplayer map, Chill Out. Love, Bungie

Debuted at the 2007 E3 Expo in Santa Monica, this exhilarating montage of moments from Halo 3 is the first public unveiling of Halo 3’s single player “Campaign” gameplay, showing off the brand new graphics engine and giving a revealing glimpse of the events that make up the epic conclusion to the Halo Trilogy. The video, produced by Bungie Studios, also features the first musical performance from Halo 3, by composer Marty O’Donnell, and dozens of never before seen views of the incredible environments, characters, vehicles and weapons that define the thrilling elements of the Halo universe. (Not Rated)

The Legendary Map Pack blends old and new. Ghost Town’s asymmetrical mix of confined spaces and long lines of fire makes for frenetic games. Avalanche re-imagines the original Halo classic, Sidewinder, with new features, tweaked vehicles and massive outdoor spaces. Significant changes bring big improvements to the map, yet its contours and cliffs should provide a welcome sense of familiarity. Blackout, on the other hand, is the purest remake to date – all time favorite Lockout gets a graphical overhaul, but retains its challenging mix of ramps, platforms, tunnels and hallways. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Explore the darkness and danger of The Halo 3 Legendary Map Pack – Blackout, Avalanche and Ghost Town. Wander the catwalks and catacombs of Blackout and its vertiginous series of aeries and turrets, illuminated by the chill and baleful glare of a moonlit sky. Avalanche is colder still, and as vast as it is icy. Fly on silent wing through its valleys and caverns. Ghost Town’s ruinous abandonment and forlorn wreckage is a testament to battles past and a warning of battles to come. See all of these spectral spaces from the unique and haunting perspective of an Elite who has known both sides of the conflict. (Not Rated)

Watch the short film, "Making of John 117 Monument", a behind-the-scenes look at the making of the Halo 3 ad. (Not Rated)

The long-awaited Mythic Map Pack drops into Xbox LIVE Marketplace. Investigate Orbital’s abandoned hallways - before it was evacuated, the Quito Space Tether was heralded as the “Civil Engineering Monument of the Millennium.” Witness Assembly, where Scarab hulls loom overhead, being decontaminated in preparation for the city-sized Lekgolo colonies that will breathe life into the massive metal husks. An excavation site surrounded by deadly Forerunner defenses, the mysteries of Sandbox are hidden high above, deep below, and right before your eyes. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Mapmaker, mapmaker make me a map! Join the actual creators of the Halo Legendary Map Pack as they take you on a guided tour of their creations. See the spaces and places they envisioned and hear where that inspiration came from and how it plays out in the Halo universe. Get a unique perspective and some solid, practical tips on how to play the latest Halo 3 multiplayer levels, Blackout, Avalanche and Ghost Town. (Not Rated)

Follow the Master Chief in his fight against the Covenant as he uncovers Halo and battles to unravel the mystery behind it. On a journey from the Pillar of Autumn to the portals of High Charity, he will encounter not one enemy but many: A terrible army occupies Earth, a vicious parasite is loosed on the galaxy, an ancient alien doomsday weapon is primed and ready to fire... And mankind’s survival hinges on the remaining few.

Watch the Halo 3 "Believe" ad. (Not Rated)