I know there are already a few popular zombie mods out there, but maybe someone could make a zombie mod that isn't based off Left 4 Dead. Also, here are some ideas that I would like to throw out there:
Each zombie is slightly different in: speed, health, and damage it does on survivors.
There is a slight chance that a zombie that hasn't seen you already can hear your gunshots/explosions and wander towards the source of the noise.
There is a chance that a zombie will spawn with chest armor or a helmet, and that part of its body is bulletproof and you'll have to shoot a unprotected part of its body.
Zombies will attack players with lights on first. (Also increase the range of which a zombie can see a human?)
There is a small chance that a zombie can infect a survivor via biting them and will have a minute or so until they turn into a zombie. (Infection may be cured with an antidote via needle?)
These are just ideas that I made up if anyone wants to use them. Because I would prefer a unique zombie mod for Blockland that isn't based off another game.