Board Thread:Suggestions/@comment-26113984-20151025014644

If any type of zombie gets X amount of kills they should get leveled up. Leveling up should increase your zombies overall stats, making it more efficent to use. Players should also get cash when they level up a zombie. The higher your zombies level, the more kills it takes to level up next time. If this idea gets implanted than users will be motivated to actually play as a zombie class.



Example:

I kill 15 users with normal zombie, I get ranked up to level 1

Attack stats go  up +2

Speed stays the same

Health stays the same

etc etc  