Falloutcraft is a Fallout inspired modpack with the goal to make the game as post-apocalyptic/Fallout-like as possible, while improving on the base Minecraft experience. Survival in this new world is extremely hostile with new weather effects, enemies and environmental status. You aren’t powerless however because you can craft/enchant yourself powerful guns, melee weapons and armor suits which will give you a significant leg-up in this unforgiving world. This modpack includes significant changes to the overworld, nether and adds a few other dimensions.

Lore:

The world has been torn apart by nuclear warfare between humans and demon invaders. As a result, the world is now an irradiated wasteland filled with abandoned cities, raiders, monsters, demons and aliens. Your goal is to survive and thrive in the wastelands of earth and eventually storm the nether and defeat the demon lords who caused earth’s catastrophe.

Mod List:

Armor Underwear Mod	The_Wabbit0101	armorunder-mc1.12.2-1.0.0.jar
AtomicStryker's Infernal Mobs	atomicstrykergrumpy	InfernalMobs-1.12.1.jar
AutoRegLib	Vazkii	AutoRegLib-1.3-32.jar
Better Foliage	octarine_noise	BetterFoliage-MC1.12-2.2.0.jar
Biomes O' Plenty	Forstride	BiomesOPlenty-1.12.2-7.0.1.2441-universal.jar
Bookshelf	DarkhaxDev	Bookshelf-1.12.2-2.3.585.jar
Carrots Library [FORGE]	The_Wabbit0101	carrotslib-mc1.12.2-1.0.0b1.jar
CodeChicken Lib 1.8.+	covers1624	CodeChickenLib-1.12.2-3.2.3.358-universal.jar
CoFH Core	TeamCoFH	CoFHCore-1.12.2-4.6.3.27-universal.jar
CoFH World	TeamCoFH	CoFHWorld-1.12.2-1.3.1.7-universal.jar
CoroUtil	Corosus	coroutil-1.12.1-1.2.37.jar
CreativeCore	CreativeMD	CreativeCore_v1.10.5_mc1.12.2.jar
Dark Utilities	DarkhaxDev	DarkUtils-1.12.2-1.8.230.jar
Dynamic Surroundings	OreCruncher	DynamicSurroundings-1.12.2-3.6.0.2.jar
Dynamic Trees	ferreusveritas	DynamicTrees-1.12.2-0.9.7.jar
Ender IO	CrazyPants_MC	EnderIO-1.12.2-5.1.55.jar
EnderCore	tterrag1098	EnderCore-1.12.2-0.5.73.jar
Food Expansion	Lellson8	FoodExpansion1.3.3-1.12.2.jar
Grappling Hook Mod	yyonne	grapplemod-v11.1-1.12.2.jar
ItemPhysic Full	CreativeMD	ItemPhysic_Full_1.4.32_mc1.12.2.jar
Just Enough Items (JEI)	mezz	jei_1.12.2-4.15.0.293.jar
Level Up! Reloaded	BeetoGuy	levelup2-1.2.4.jar
LibraryEx	LogicTechCorp	LibraryEx-1.12.2-1.1.1.jar
Lycanites Mobs	Lycanite	lycanitesmobs-1.12.2-2.0.6.6.jar
MineTraps	XxRexRaptorxX	MineTraps-1.12.2-(v.1.0.4).jar
NetherEx	LogicTechCorp	NetherEx-1.12.2-2.1.1.jar
OreLib	OreCruncher	OreLib-1.12.2-3.6.0.1.jar
Quark	Vazkii	Quark-r1.6-178.jar
Radiate'em ALL!	CweLTH	radiateemall-1.0.jar
Redstone Flux	TeamCoFH	RedstoneFlux-1.12-2.1.0.6-universal.jar
Shadowfacts' Forgelin	ShadowfactsDev	Forgelin-1.8.4.jar
Spartan Weaponry	ObliviousSpartan	SpartanWeaponry-1.12.2-beta-1.3.8.jar
Techguns	pWn3d_1337	techguns-1.12.2-2.0.2.0_pre3.1.jar
The Aether II	GildedGames	aether_ii-1.12.2-0.2.7+build224-universal.jar
The Lost Cities	McJty	lostcities-1.12-2.0.22.jar
Thermal Expansion	TeamCoFH	ThermalExpansion-1.12.2-5.5.4.43-universal.jar
Thermal Foundation	TeamCoFH	ThermalFoundation-1.12.2-2.6.3.27-universal.jar
Thicc Entities	wiresegal	thiccentities-1.4.jar
Tough As Nails	TheAdubbz	ToughAsNails-1.12.2-3.1.0.139-universal.jar
Traveller's Backpack	tiviacz1337	TravellersBackpack-1.12.2-1.0.22.22.jar
Tree Chopper	MrDuchy	TreeChopper-1.12.2-1.2.4.jar
Twisted Tweaks	PuppetzMedia	twistedtweaks-1.12.2-0.5.2.jar
Worley's Caves	super_fluke	worleycaves-1.5.1.jar
Zombie Awareness	Corosus	zombieawareness-1.12.1-1.11.16.jar

Suggested tweaks:

lost cities mod: generate singleplayer worlds with wasteland preset
download the sound physics mod and change global reverb gain to: 1.5
thicc entities: change all zombies-based mobs’ speed to 1.5 (makes zombies scarier)
install optifine
use shaders with heavy fog
lower render distance to 8 chunks (anything higher is not necessary if you are using fog. Also keeps framerate good)
recommended 4gb of ram