Foundry

Foundry is a multiplayer map released for Halo 3 as part of the downloadable Heroic Map Pack. It was made available on December 11th, 2007. It is primarily intended as a forge map, and almost all features of the map are non-static and forgeable. New to forge is the ability to add walls, fences, stairs, bridges, tunnels, shield walls, sign boards and man cannons.

Trivia

 * There is a crane on this map, as well as two shipping areas: A and B. Most of the boxes have "P425" printed on them, indicating possibly that that section of the foundry is Section P425, or it could be a serial number of some sort.
 * A giant soccer ball was included in this map's Forge palette. Bungie has stated that soccer games (using hammers) actually works quite well.