Originally Posted by Dark Splank
Also, for all of the level specific achievement's it's alot easier to do co op with a dummy account and play that way, the main profile (the one your getting the achievement for) wont move and will be a great respawn point if you die.
The videos were added to the guide. As for the dummy controller, that was actually one of the tipis I added to my General Tips section at the top of Post #2. It really does work great for people trying to get the achievements easily.