Newly independant Halo developers Bungie have been talking a lot about new maps, using code words and vague tempting descriptions, but now they make the trio of multiplayer additions official.

Available December 11, 2007 for 800 MS Points ($10 US) will be the Halo 3 Heroic Map Pack. You’ll be able to download these using your XBox Live account connection. There are 3 maps in all: Standoff, Rat’s Nest, and Foundry.

Standoff is a symetrical map with 2 bases set at dusk and giant satellite dishes in the background. Rat’s Nest is the companion to the campaign mission Crow’s Nest, featuring indoor and outdoor settings. Foundry was designed from the ground up for Forge alterations; apparently almost everything in the map can be moved or deleted.

Those not wishing to buy the maps will get them free in Spring, right when the next map pack goes for sale.

Read all about maps direct from the designers at Bungie.net