I am not 100% how this one should be handled. I was again comparing DLC packs with TA and Alice: Madness Returns comes with a 2nd disc with a game (American McGee's Alice) that is considered DLC. GTN is lumping these 6 achievements with the rest of the achievements for the main game.
Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete.
Otherwise, please post a new thread in this forum instead.