With dangerous mobs and killer depths few will be able to survive what the darkness holds inside.

Mob buffs and many new monsters will keep you scared of traveling outside alone so grab a friend and hide away in your fortress.

Mods

JourneyMap (by techbrew)
Mantle (by mDiyo)
Tinkers Construct (by mDiyo)
Iron Chests (by progwml6)
Chisel (by tterrag1098)
Pam's HarvestCraft (by MatrexsVigil)
Botania (by Vazkii)
Waila (by ProfMobius)
Waila Harvestability (by squeek502)
Blood Magic (by WayofTime)
BiblioCraft (by JDSinclair)
CodeChickenCore (by chicken_bones)
NotEnoughItems (by chicken_bones)
DecoCraft2 (by RazzleberryFox)
Carpenter's Blocks (by Syntaxial)
NEI Addons (by bdew)
NEI Integration (by tonius111)
Jabba (by ProfMobius)
AgriCraft (by InfinityRaider)
NetherOres (by skyboy026)
Thaumcraft (by azanor)
VeinMiner (by Portablejim)
Thaumcraft NEI Plugin (by DjGiannuzz)
MalisisCore (by Ordinastie)
MalisisDoors (by Ordinastie)
Witchery (by Emoniph)
Roguelike Dungeons (by Greymerk)
The Twilight Forest (by Benimatic)
Thaumcraft Inventory Scanning (by BlayTheNinth)
Thaumic Exploration (by nekosune)
Thaumic Tinkerer (by nekosune)
Traveller's Gear (by BluSunrize)
Backpacks (by Eydamos)
iChunUtil (by iChun)
Biomes O' Plenty (by Glitchfiend)
GraveStone Mod (by EuhDawson)
Metallurgy (by JeanGlassmaker)
LootBags (by Malorolam)
Better Dungeons (by Chocolatin)
Tinkers' Defense (by Lance5057)
Iron Backpacks (by gr8pefish)
Tainted Magic (by yorkeMC)
WorldEdit (by sk89q)
Ender Zoo (by CrazyPants_MC)
Minecraft Comes Alive (MCA) (by WildBamaBoy)
HelpFixer (by matthewprenger)
Mob Dismemberment (by iChun)
RadixCore (by WildBamaBoy)
Ars Magica 2 (by Torarion)
Thaumcraft Mob Aspects (by Parker8283)
Nodal Mechanics (by Shukaro)
Back Tools (by iChun)
AtomicStryker's Battle Towers (by AtomicStryker)
Magical Crops: Armoury (by Mark719)
Fullscreen Windowed (Borderless) for Minecraft (by hancin)
Metallurgy Core (by JeanGlassmaker)
Blood Arsenal (by Arcaratus)
Emotes (by Vazkii)
Custom NPCs (by Noppes)
Better Builder's Wands (by Portablejim)
Magical Crops: Decorative (by Mark719)
Hardcore Darkness (by lumien231)
Baubles Stuff (by zazpro)
Durability Show (by 61352151511)
Baublelicious (by DenBukki)
Magical Crops: Core (by Mark719)
Treecapitator (by bspkrs)
NetherPortalFix (by BlayTheNinth)
CraftHeraldry (by Vazkii)
Ancient Warfare 2 (by shadowmage45)
DeathQuotes / Death Quotes (by andrenoel1)
Epic Siege Mod (by Funwayguy)
Mine & Blade: Battlegear 2 (by Nerd_Boy)
Runic Dungeons (by MrComputerGhost)
Mutant Creatures Mod (by thehippomaster21)
AnimationAPI (by thehippomaster21)
CoFH Core (by TeamCoFH)
OpenModularTurrets (by Poenjabiesous)
Custom Mob Spawner (by DrZhark)
Mo' Creatures (by DrZhark)
Mo' Zombies! (by Coocoo617)
AppleCore (by squeek502)
The Spice of Life (by squeek502)
Zombie Awareness (by Corosus)
AtomicStryker's Infernal Mobs (by AtomicStryker)
Extra Utilities (by RWTema)
Ender IO (by CrazyPants_MC)
Immersive Engineering (by BluSunrize)
Morpheus (by Quetzi)
Wawla - What Are We Looking At (by darkh4x)
Brandon's Core (by brandon3055)
Draconic Evolution (by brandon3055)
Applied Energistics 2 (by AlgorithmX2)
Cooking for Blockheads (by BlayTheNinth)
Industrial Craft (by Player)
Thermal Foundation (by TeamCoFH)
Thermal Dynamics (by TeamCoFH)
OpenModsLib (by OpenMods)
OpenBlocks (by OpenMods)
ComputerCraft (by dantwohundred)
BdLib (by bdew)
AE2 Stuff (by bdew)
Buildcraft (by CovertJaguar)
Thermal Expansion (by TeamCoFH)
ProjectE (by sinkillerj)
Ender Storage (by chicken_bones)
MrCrayfish's Furniture Mod (by Mr_Crayfish)
StacksOnStacks (by Madxmike856)
Sync (by iChun)
Hardcore Ender Expansion (by chylex)
More Player Models (by Noppes)
LLibrary (by iLexiconn)
JurassiCraft2 (by gegy)
Thaumic Equivalence (by Lilylicious)
IvToolkit (by Ivorforce)
Psychedelicraft (by Ivorforce)
Hats (by iChun)
Lycanites Mobs (by Lycanite)
Special AI (by docrobb)
CoroUtil (by Corosus)
Custom Music Discs (by pifou92000)
Ambience (Music Mod) (by Vazkii)
BetterFps (by Guichaguri)
Dynamic Lights (by AtomicStryker)

Darkness Destroys

AE2 Stuff

AgriCraft

Ambience (Music Mod)

Ancient Warfare 2

AnimationAPI

AppleCore

Applied Energistics 2

Ars Magica 2

AtomicStryker's Battle Towers

AtomicStryker's Infernal Mobs

Back Tools

Backpacks

Baublelicious

Baubles Stuff

BdLib

Better Builder's Wands

Better Dungeons

BetterFps

BiblioCraft

Biomes O' Plenty