Utilizing a good mix of mods such as grue and eyes in the darkness. I have made a mod pack in an attempt to make minecraft make you feel a bit more on edge. i wont share to much about the contents of the pack you'll just have to see for yourself.

use a shader pack with min light level 0 for best effect

https://www.curseforge.com/minecraft/customization/chocapic13-shaders/files

Features

Thirst and temperature

more realistic animations

shorter days and more dangerous nights

more dangerous mobs

guns and turrets for late game defense

and much much more

mobs like zombies and spiders will make more of an effort to make there way to you. possibility to get dragged into another dimension. thirst and heat will make the pain you'll endure just that much worse.

optifine will be required in versions past 1.0.2 of the pack do to the gun mods

https://optifine.net/adloadx?f=OptiFine_1.12.2_HD_U_G5.jar&x=b4e6

you can ask me questions here on my discord https://discord.gg/6u8DnVr 

as well as #modpack-feedback

Public server: 23.83.91.2:40445

Nebi's Horror Survival Pack

A Crude Start

AlcatrazCore

Animalium

BetterNether

Camouflaged Creepers

CoroUtil

CreativeCore

Custom Starter Gear

DarknessLib

Dynamic Lights

Dynamic Surroundings

Dynamic Trees

EnhancedVisuals

Epic Siege Mod

Eyes in the Darkness

Farseek

Grue

Hardcore Darkness

iChunUtil

IvToolkit