www.bungie.net | halo.bungie.net | bungiestore.com
http://www.bungie.net/Forums/posts.aspx?postID=28514358
How will the Halo 3 achievements trigger when finding the skulls on Halo 3 ODST ?How will you be able to join people on H3 when you are on H3ODST? (Different Titles)
ohai...
No, I don't think the games will have joint multiplayer. But there will be some sort of tracking system that will know when you have the achievements on H3:ODST onto Halo 3.