Alpha Site

Alpha Site is a map for the new Firefight game type in Halo 3: ODST. Not much is known about this map except it is unlocked by completing the ONI Alpha Site level in Campaign.

The map's general layout could be described as a bow-tie, with players spawning on one side and enemies spawning on another, separated by a narrow intersection of stairs in the middle, divided by elevators, which can sometimes bring down enemies. Players start on one side of the map, while enemies are dropped off by phantoms on the opposing side.

The map was revealed in the 7/31/09 Bungie Weekly Update. It takes place in the interior of the ONI Alpha Base.

Tactics

 * There is a good tactic on this map to survive very long time even on more challenging difficulties. The players have to enter the elevator and stay at the corners of the elevator. When brutes show up, they will try to melee the ODSTs through the glass - but they won't damage the players. However, with a well-aimed melee, the player can hit the enemy through the glass via aiming at the weapon of the brute. Also, while an enemy is hitting against the glass, another player can simply go behind the target and assassinate him (That's a excellent tactic for brutes armed with Gravity Hammers).
 * A simple yet sound strategy is to use the side of the map that enemies dont spawn at as your "turf" as it has most of the power weapons, tons of normal ammo, and excellent cover and field of fire as well as no attacks from behind to worry about.
 * The sniper rifle is oddly very effective on this map to use in the above strategy.

Gallery
 File:Alpha_Site.png|A bird's eye view of Alpha Site. 