[Son of Kyuss]

Originally Posted by Nidemaba

Well that sucks. Does it matter if you did it with co-op?

And did you just go through every single level in the game or only the boss levels?

Thanks for the response!

Well the achievement description does state with Knives only, so I would assume it means single-player only. I ran through the entire game in it's entirety considering I had yet to begin the game with Knives.