The Halo 3 Heroic Map Pack will be free to download on March 25th. Bungie is allowing the free download due to the upcoming legendary map pack. The free heroic maps will be required to play Ranked Big Team, Social Big Team, Team slayer, and Rocket Race.
To those of you the haven’t gotten a chance to play these maps you may wish to download some videos of them on bungie so you can get a feel of what they are like before they go live for you. This will help you learn where the weapons are I imagine. I’m not so sure what else it will do, as I’ve already purchased the maps and have no need to download the videos.
If you fail to download the maps then you will not have access to any of the above playlists. They will remain in the DLC Games until the Legendary Map Pack is released. So congrats, you have successfully waited it out saving yourself 800 microsoft points or $10.