Bungie is celebrating itself today and offering you a bag of Halo 3 goodies for absolutely free.
As we've already mentioned, top of the pile is the new Cold Storage map, which is a remake of Chill Out from Halo 1. Plus you can also grab the Legendary Map Pack for a little less money at 600 Microsoft Points (GBP 5 / EUR 7) .
You'll need to have those if you want to join the Cold Storage online playlists, by the way, which will be rotated from today.
Bungie is offering an Xbox 360 theme as well as a bundle of Gamerpics, too. These will only be available today, so you had better get moving.
The Bungie website also has some celebratory freebies up for grabs, such as forum avatars, profile backgrounds and group skins.