Celebrate the free release of Halo 3’s Heroic Map pack with this trailer; it features a few of our favorite things created by the community using the Heroic maps.

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

Watch the Halo 3 Ad, "Believe" Diorama. (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)

With its defensive forces all but obliterated, Earth has fallen to the unstoppable might of the Covenant. These alien occupiers have discovered something beneath the ancient African sands - something incredible...something Forerunner.

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

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.

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.

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.