This zombie pack is not your average zombie pack...
It uses Insanity Shaders as well as the Truedark mod to really amp up the feel you get exploring at day, but more importantly night.
I revamped the combat to make you likely want to invest in guns as its super easy to mess up your timing, course' you could master it and get away with using it, but it is not recommended.
I have taken the liberty to remove skeletons as well as many other hostile mobs to focus on specifically zombies, so the only thing you will really see are just zombies, but be warned these zombies are not your typical ones. Not only do they respond to you breaking blocks and swarm you, they also do this if you take damage and bleed, as well as when you fire gunshots, so now you need to use ammo even more sparingly.
There is also a thirst and slightly revamped hunger system, where now food replenishes a bit more, and thirst is the biggest thing you have to keep up with, which is more realistic and less annoying. There is also no tree punching so I recommend being sparing with the pickaxe you start with, If need be pick up rocks and I recommend checking recipies with JEI to learn how to do it, its not hard to learn.
Lastly, I encourage hard difficulty or hardcore as no longer will hunger be even more of an issue using it. I have made this in such a way that most people who know vanilla enough can succeed in this without it being too overbearing, but the difficulty will help balance it to make guns more fair. Also check out the controls, I feel I made them pretty universal, anything set to scroll lock I personally deemed not important, change whatever.
Happy Zombie Killing~