» Thu Jun 14, 2012 3:47 pm
There seems to be a distinction between the two. I'm not certain, but I believe an expansion must expand the main land while adding quests, characters, etc to the mainland. Therefore, it may not be correct to say Point Lookout was an expansion, because it added a small area that does not affect the Capital Wasteland. On the other hand, it seems appropriate to call any add-on an expansion if it is large enough, regardless of connection to the MQ and mainland, which is why some call Shivering Isles an expansion.
The terms are largely interchangeable, though.