Board Thread:New on Counter Strike Online Wiki/@comment-34454246-20180124114429/@comment-1222445-20180124204740

TBH Zombie Upgrade is super grindy. I am glad it's gone.

You can evolve as usual, but you do not get level ups for doing some actions (Jumping Lv.1 and so on). Zombies reportedly are as tough as their Lv.3 counterparts now.