Well, I guess, I wasn't clear enough, I desire a gameplay where we can kill zombies once and for all, with For example, The game sets to 40,000 zombies, Now we cnanot have more than that, and each chunk has some unequally but definite percentage of zombies from those 40,000, we humans are not unlimited, and then for example we kill 400 zombies in one specific chunk leaving us with 39600, and this number cannot increase as zombies don't reproduce, and then from this 39600 zombies a specific defined percentage once again gets allocated to this empty chunk, but this percentage should keep on decreasing to prevent anyone from farming in one spot and be zombie free for the whole game, and, obviously the 39600 should be randomized in other chunks unequally- equally, and with the passage of time they should get stronger, so being zombie free gets more rewarding, does it make sense now? Hope it does.... And this will be beautiful after the npc's, how is the idea?, if it still doesn't make sense, please ask.. I will try to explain once more