I installed The Oregon Trail on to my NC. It had to install an additional 278mb of info onto the NC which took up a large chunk of storage space on my device. I've since archived the game and want to remove the additional files from my NC is there some way I can do that or am I out of luck here.
You would probably have to connect your Nook to a PC using your USB and manually remove the extra files.
You could always buy a mini SD card to give your Nook extra storage. A lot of these apps are so big that you're pretty much going to need one, otherwise you'll have to keep archiving apps to make space.