There is a bug with the achievement ‘Devolution Retribution’ of Zeratul.
The text says “Kill 200 devolved enemies in a single game.” but when you enlarge the progress box, it says 0/500.
I tried it yesterday two times, but once it reaches 200/500 it stuck.
I even tried it further… I wasted almost 2 hours in a mission to be sure that I got over 500 even tho it doesn’t show up, but I never got the achievement. So it’s definitely not only a ‘graphic bug’. It’s just not possible to get that achievement at the moment.
It almost seems like the progress is set to a maximum of 200 like the text says, but the achievement only fulfills if you would reach 500 which isn’t possible.