How do you kill Barnabus? I thought I got the levers, does the large ball have to disapere? I have been fighting and do not seem to be doing any damage. I hope I dont have to do those stupid platforms again.....
You should get cutscenes of the shields around the nest and Barnabus' platform being disabled when you pull the two levers in the caves accessed by the lower two teleporters. One is easy to get to, another requires more effort (with jumps and a lever or two before you can get to the one you need).
There is a description (and later a link to a video) of the more elaborate lever to get to in the link I gave above. The other cave just has a lever on the ground (and locked chest) at the end.
Thanks, I got it. Feel bad needing help when after you get it it seems so simple. Just that little bit of advice goed along way. Hope you had a Merry Christmas