If you didnt already know 343 is going to release the multiplayer maps that come with the halo CEA game on the xbox marketplace and i was just wondering will there be multiplayer achievements? because if you think about it if there is multiplayer achievements which game will the achievements show up on and if they release the achievements in the dlc and the halo CEA disk that will have some people abusing the system to get extra gamerscore. Or will it just bring the maps only?
I am not sure I understand all your questions in their entirety but I can say that H:CEA will have MP Achievements. In fact according to Max Hoberman, the founder of Certain Affinity the company making the MP maps, achievements this go around will be more extensive and varied compared to those that were available with the Defiant map pack. I would assume MP achievements will go to Halo: Reach GS and the Campaign will go toward the H:CEA GS.