The following achievements should be moved from the DLC to the main game as they are achievable without having the DLC:
The first two definitely since I have them unlocked without owning the DLC.
The next two
probably since I have progress of 9,000+/10,000 and 5/10 in them, and it should only be a matter of time before I unlock them.
The other two should theoretically be possible without [but possibly easier with] the DLC.
The other four definitely need the DLC, though.
p.s.: This guide on Steam supports my assumption, re: "Chuck Norris" and "Maniac Vandal":
http://steamcommunity.com/sharedfiles/filedetails/?id=595783...