Assuming they don't make any new DLC playlists, and ending up in a lobby with everyone else having DLC is pretty unreasonable, can any of the DLC achievements be gotten in any non-DLC playlists? I know this was the case with Reach, but what about here? --- Life is beautiful. Rainbow Dash is best pony; Luna is best princess.
I think that, as long as the Achievement doesn't specify a DLC map, you should be able to.
But I don't have the DLC. Honestly, though, I think you're **** out of luck, because 343i's Matchmaking system simply isn't forgiving to people who purchase DLC. --- This sig will self-destruct in 3.... 2.... 1.... Thank you for your time. Cookie? ^_^