Hello! I've really enjoyed the campaign of the game, but I don't really understand, in the plot of the game, which is the real importance of that "karma weapon".
I've discovered BL1 some months ago. In spite of single player was a little bit slow and the cities underpopulated I rerally enjoyed the campaign and the DLCs.
Borderlands 2 has been an epic delusion.
LOL! Money well spent then! xD
I'm playing CoD BO2 now and I'm finding it very good. The campaign is beautiful, I don't know about zombies and multiplayer, since I don't play them at all.
Is yours the pc version?
If the answer is yes, have you tried in steam the "verify integrity of game cash" command in the Skyrim properties window?
But I fear your saves are somehow corrupted. Are you using some mods? Mods can do a real mess with savegame files and cause many ingame bugs.
If you're using mods try to delete them from the Skyrim directory.
Imo borderlands 2 is a pile of crap. It's too long to explaing every reason here, but if you seek on metacritic my user review, well, that's all you need to know about MY opinion.