You would think they wouldn't wanna do it that way, but they do.
I have the same problems with games that have requirements that are multiplayer-only achievements..... sooooooooooooooo annoying!!!
Example: In Borderlands 2 there are in-game challenges (that lead to achievements) that require you to be a passenger of a vehicle and manning the gun while moving, getting X amount of kills on Y enemies.
On a side note, my son decided to grab hold of my disc tray and yank on it this morning before I left for work. Now it doesn't even close all the way. Going to try to realign it without taking it apart, but I managed to get some Torx screwdrivers if I absolutely have to get in there.
No moar Skyrim for a bit..... that makes me sad