Talk:Mutations/@comment-189.124.127.21-20160805212610/@comment-37.194.63.87-20160815133332

The achievement immediately pops up the moment you acquire enough rads for level Ultra as Skeleton. You don't have to pick one of the Ultra mutations or even survive the area where you got it. So the answer would be yes, except there's no way you're gonna achieve Ultra before reaching the throne. I only reached level Ultra in L1 4-1 myself.