I have played HALO 2 over and over agian and I cant get the achievements to pop that a for beating the campaign on Legendary. I was having trouble with the level"Uprising" in that till today it never even counted me as beating that level. However it and a couple achievements unnllcked today but beating the campaign on legendary wasnt one of the achievements. HALO 3 ODST is having the same issue. It wont unlock the achievement for beating the first level nor did I get the achievement for beating that campagine on legendary.
Been having the same issue on H2A Legendary for past week. Gone past the point of redoing Uprising and The Great Journey for the 100th time… Hoping they’ll pop up in a few days.