Three exclusive multiplayer maps that shipped with Halo 3: ODST are making their way to Halo 3 as well. On February 2nd, Bungie intends to release "Mythic 2 Map Pack" through Xbox Live.

I'm not sure why they decided to call the map pack "Mythic 2" instead of giving it its own name but whatev. The following maps are included in the pack:

• "Heretic" brings players to familiar ground as the “Halo 2” arena Midship returns in “Halo 3.” The stark interior of the Pious Inquisitor might appear austere on first glance, but Heretic’s symmetrical spaces require players to execute complex strategies in order to outplay their opponents.
• "Citadel" may be a long abandoned Forerunner stronghold, but its small, symmetrical confines are far from secure. Two opposing bases offer little safety for players looking for solace. Instead, Citadel forces small squads to stay in constant communication, keep their heads on a swivel, and be prepared to adjust combat tactics in close quarters.
• "Longshore" lacks the commercial ships that once made it a lucrative port for Old Mombasa, but it still bustles with activity. Designed for large-scale combat and well-suited for smaller affairs, Longshore’s multitude of industrial buildings, elevated walks, and open inlets conspire to create a complex battleground tailored for multiple combat scenarios.

Mythic Map Pack 2 will cost 800 MS Points ($10) upon release.