Construct
Description: Vast quantities of water and other raw materials are consumed in creating even the smallest orbital installations.
Recommended Players: 2-8 Players
Tactics: A medium sized map featuring big gravity lifts and Support weapons like missile pods and flamethrowers, this is the only map that you can earn the incineration medal. Scoped Rifles are Highly recommended to combat anyone with a energy sword. There is a Spartan Laser here but it is not really recommended but just might be useful.
Recommended Game Types: Slayer and Oddball
Epitaph
Description: Some believe the Forerunners preferred desolate places. Others suggest that few other sites survived the Flood.
Recommended Players: 2-6 Players
Tactics: The map is moderately large with gravity lifts and both the Active Camo and Overshield power-up. Most kills are done on the first floor right in the centre or in the rooms on either side. Using the columns as cover will help you survive fire but enemies may come and melee you if they are close enough. The top levels are for people with battle rifles or any other scoped rifle.
Recommended Game Types: Slayer and King of the Hill
Guardian
Description: Millenia of tending has produced trees as ancient as the Forerunner structures they have grown around.
Recommended Players: 2-6 Players
Tactics: Using shotguns and melee is essential in this tiny map. Needlers work too, but not as effective. Active Camo is worth gold here as assasination equals killing spree. But note that the radar is not effective even though this is a small map as the two floors are almost exactly aligned.
Recommended Game Types: Slayer and Oddball
High Ground
A relic of older conflicts, this base was reactivated after the New Mombasa Slipspace Event.
Isolation
Halo 3 Isolation
Last Resort
Remote industrial sites like this one are routinely requisitioned and razed as part of Spartan training exercises.
Sandtrap
Description: Although the Brute occupiers have been driven from this ancient structure, they left plenty to remember them by.
Recommended Players: 6-16 Players
Tactics: One of the largest maps in Halo 3, Sandtrap displays a vehicle exclusive to itself: the Elephant. The Elephant is the largest, heaviest and slowest vehicle is the game. Some people guard the Elephant with the two turrets on it while one drives. The Elephant itself is invulnerable. Other than that the banshee is the owning vehicle here. Sniper rifles are not really good as there are lots of places for people to hide in.
Recommended Game Types: All types of Big Team Games
Snowbound
Hostile conditions did not prevent the Covenant from seeking salvage on this buried Forerunner construct.
Valhalla
The crew of V-398 barely survived their unplanned landing in this curious gorge.
Heroic Map Pack
The Heroic Map Pack contains 3 new maps and can be downloaded from the Xbox Live Marketplace for 800 Microsoft Points.(It will be annouced free in late summer.)
Standoff
The symmetrical valley of Standoff, with its entrenched bases and fields of boulders is ideal for mid-sized objective and Slayer game types.
Rat's Nest
The vast, labyrinthine passages of the Rat's Nest brings something completely new to the multiplayer experience: an indoor vehicle paradise. Strongly influenced by the Campaign mode, this map is ideal for big team battles.
Foundry
Foundry is the ultimate Forge map. Players can edit every single object in this voluminous industrial warehouse, placing stairways, walls, bridges, and tunnels to create an entirely new play space and build almost any kind of map imaginable. Also available to the map are the new Mancannons (Large Gravity Lifts), Soccer Balls and other new items.