Once Call of Duty: Modern Warfare 2 arrives, the demand for COD: World at War's premium map packs will likely decrease. With that in mind, the price of all three map packs has been halved.

Starting today, you can download any of the packs through Xbox Live and PSN for 400 MS Points ($5) instead of the usual 800 ($10). Each map pack contains three normal competitive multiplayer maps as well as a map for the zombie co-op mode. The offer runs until November 1st. Note that the PS3 discount is only available in North America.

Treyarch also announced that three new playlists will go live today:

• Hardcore HQ: The addition of Hardcore Headquarters to the Hardcore playlists has taken effect, by popular demand.
• Team Flags: In the MAP PACK category, the old “Team Objective” playlist has been removed, and replaced with two playlists; Team Flags being one of them (CTF, Domination, and War).
• Team Objectives: Also in the MAP PACK category, the counterpart to Team Flags is this new playlist, Team Objectives (S&D, HQ, and Sabotage).

Oh, and from now until November 1st, all experience gains will be doubled.