The update for the Left 4 Block zombies pack is coming, I'll update the main topic to discuss each of the new changes/fixes/additions I've made for them. For now, the extension pack will include 3 new zombies. The main pack will include the spitter. With this new update, the requirements for the flashbang and gas mask item are removed. Feel free to remove those items after this update is rolled out. I'll update this reply when the update's available.
L4B Main PackSpitterBasically the same zombie from Left 4 Dead 2, this one's ability is to spit and has a cooldown of 8 seconds. If it dies, it will spawn a few acid projectiles to harm the player from the grave.
L4B Extension PackConstruction ZombieA generic zombie type, but this one's ability is to ignore pipe bombs and bile bombs distractions.
CEDA ZombieIf SWeps Extended pack is enabled, any projectile having to do with fire (Molotov, Flamer, Flaregun) will render no damage to this zombie type, you'll have to take it down via other means. When it dies, the zombie has a 25% chance of spawning a bile jar.
Fallen Survivor ZombieThis is a recently infected zombie, one that has fallen to the infection. However, if this zombie spots an enemy, he will flee. Killing him will result in a variety of lootable items. These loots will vary depending on what add-ons you've enabled besides the default pipe bomb. These add-ons are:
-Item_Score_Pickups
-Weapon_SWeps
-Item_Healing