This Modpack is about:

A huge Amount of new Biomes to explore

Many new Animals and Monsters in all Dimensions

A great Variety of nice looking Building Blocks

Heavy Machinery and Ore Processing

Building Reactors and Handling radioactive Resources

Building Rockets and visiting distant Planets

Gameplay Enhancements like Crawling and Wall Jumps

A Lot of new Ores and Gems for Armor and Tools

Modern Weapons and Vehicles

Modlist v2.3:

Waddles (by Girafi)
Xaero's Minimap - Modded Support (by babybluetit)
Alex's Delight (by NCP_Bails)
Just Enough Resources (JER) (by way2muchnoise)
Shutup Experimental Settings! (by Corgi_Taco)
PneumaticCraft: Repressurized (by desht_08)
Polymorph (Forge) (by TheIllusiveC4)
Extra Disks (by MelanX)
Collective (Forge) (by Serilum)
Wilds (by SpicyBananaModding)
BetterF3 (by cominixo)
Bigger Reactors (by RogueLogix)
Bayou Blues (by team_aurora_modding)
Abundance (by team_aurora_modding)
Scorge (by illyohs)
Healing Campfire (Forge) (by Serilum)
Mekanism Additions (by bradyaidanc)
Mekanism (by bradyaidanc)
Bamboo Blocks (by TeamAbnormals)
Immersive Industry (by yuesha_yc)
Mekanism Generators (by bradyaidanc)
Mekanism Tools (by bradyaidanc)
Hammer Lib (by Zeitheron)
Nether's Delight (by lumpazl)
Simply Light (by Flanks255)
Wall-Jump! [FORGE] (by genandnic)
Blueprint (by TeamAbnormals)
Repurposed Structures (Forge) (by telepathicgrunt)
Project Red - Integration (by MrTJP)
Project Red - Illumination (by MrTJP)
CleanCut (by Rongmario)
Comforts (Forge) (by TheIllusiveC4)
Placebo (by Shadows_of_Fire)
The One Probe (by McJty)
iChunUtil (by ohaiiChun)
Beyond Earth: Giselle Addon (by 지젤쟝다)
Placeable Items (by Ferdz_)
Guns Without Roses (by Lykrast)
RFTools Builder (by McJty)
Tool Belt (by gigaherz)
Item Collectors (by SuperMartijn642)
Flux Networks (by sonar_sonic)
Bookshelf (by DarkhaxDev)
Paragliders (by Tictim)
CC: Tweaked (by SquidDev)
Infernal Expansion (by InfernalStudios)
Trash Cans (by SuperMartijn642)
OpenBlocks Elevator (by vsngarcia)
Portality (by Buuz135)
Aquafina (by hugomage999)
Building Gadgets (by Direwolf20)
AI Improvements (by QueenOfMissiles)
RFTools Base (by McJty)
The Endergetic Expansion (by TeamAbnormals)
YUNG's API (Forge) (by YUNGNICKYOUNG)
Environmental (by TeamAbnormals)
Draconic Evolution (by brandon3055)
Autumnity (by TeamAbnormals)
RFTools Storage (by McJty)
more ships (by tombkingsts)
Carry On (by Tschipp)
Chipped (by ToadstoolStudios)
Refined Storage (by raoulvdberge)
Chisel (by tterrag1098)
Camera Mod (by henkelmax)
Brandon's Core (by brandon3055)
JEI Integration (by SnowShock35)
Energy Meter (by DamnRelentless)
Curios API (Forge) (by TheIllusiveC4)
Immersive Engineering (by BluSunrize)
Unnamed Animal Mod (by Coda1552)
ConnectedTexturesMod (by tterrag1098)
CraftTweaker (by Jaredlll08)
Metal Barrels (by tfarecnim)
YUNG's Better Caves (Forge) (by YUNGNICKYOUNG)
U Team Core (by HyCraftHD)
Gems & Jewels (by sea_leaf)
Just Enough Vehicles (by Ozelot5836)
Platforms (by ShetiPhian)
Traveler's Titles (Forge) (by YUNGNICKYOUNG)
Farmer's Delight (by vectorwing)
Quark (by Vazkii)
YUNG's Bridges (Forge) (by YUNGNICKYOUNG)
Industrial Foregoing (by Buuz135)
AutoRegLib (by Vazkii)
Quark Oddities (by Vazkii)
Configured (by MrCrayfish)
Engineer's Decor (by wilechaote)
Architectury API (Fabric/Forge) (by shedaniel)
Enchanting Infuser [Forge] (by Fuzs_)
McJtyLib (by McJty)
Click Machine (by Shadows_of_Fire)
Portable Crafting Table (by 00theblackwolf00)
Mantle (by mDiyo)
Xaero's World Map (by xaero96)
Refined Pipes (by raoulvdberge)
Useful Backpacks (by HyCraftHD)
Small Fancy Crosshair (by professorschmaxolotl)
Better Burning (by DarkhaxDev)
ItemPhysic Lite (by CreativeMD)
Obfuscate (by MrCrayfish)
BetterEnd Reforked (by someoneelsewastaken)
Valhelsia Core (by ValhelsiaTeam)
Puzzles Lib [Forge] (by Fuzs_)
Biomes O' Plenty (by Forstride)
Compact Machines (by davenonymous)
Controlling (by Jaredlll08)
Unity: Dark Edition (by theCyanideX)
Bamboo Everything (Forge) (by Gaz_)
ewewukek's Musket mod (by ewewukek)
YUNG's Better Mineshafts (Forge) (by YUNGNICKYOUNG)
Refined Storage: Requestify (by Buuz135)
Environmental Materials (by ValkyrieofNight)
RFTools Dimensions (by McJty)
Enchantment Descriptions (by DarkhaxDev)
Project Red - Core (by MrTJP)
Immersive Petroleum (by Flaxbeard)
Atmospheric (by TeamAbnormals)
FerriteCore (Forge) (by malte0811)
Tissou's Zombie Pack (by Tissou)
LibX (by noeppinoeppi)
Selene Lib (by MehVahdJukaar)
Cultural Delights (by NCP_Bails)
Beyond Earth (Forge) (by mrscauthd)
TOP Addons (by DrManganese)
Creative Wireless Transmitter (by Ultramegaaa)
MrCrayfish's Vehicle Mod (by MrCrayfish)
AppleSkin (by squeek502)
Draconic Additions (by FoxMcloud5655)
Odd Water Mobs (by jocosero)
Phosphophyllite (by RogueLogix)
Environmental Tech (by ValkyrieofNight)
Fast Leaf Decay (by olafskiii)
Guard Villagers (by almightytallestred)
Iron Furnaces [FORGE] (by XenoMustache)
Just Enough Items (JEI) (by mezz)
Iron Chests (by ProgWML6)
Charging Gadgets (by Direwolf20)
ValkyrieLib (by ValkyrieofNight)
The Outer End (by BlueDuckYT)
Entity Culling Fabric/Forge (by tr9zw)
Extra Boats (by TeamAbnormals)
SuperMartijn642's Core Lib (by SuperMartijn642)
Patchouli (by Vazkii)
Portable Stonecutter (by weirdbrackets)
Aquaculture 2 (by Shadowclaimer)
YUNG's Extras (Forge) (by YUNGNICKYOUNG)
YUNG's Better Dungeons (Forge) (by YUNGNICKYOUNG)
ShetiPhianCore (by ShetiPhian)
Farmer's Delight Compats (by burritoeatinghamster)
BetterDefaultBiomes (by Xratedjunior)
Just Enough Professions (JEP) (by Mrbysco)
GoProne (by Alpvax)
Alex's Mobs (by sbom_xela)
Campful (by lumpazl)
Environmental Core (by ValkyrieofNight)
ObserverLib (by HellFirePvP)
Supplementaries (by MehVahdJukaar)
Spheric (by y4z0n)
RFTools Utility (by McJty)
Quantum Quarry Plus (by inzhefop)
Chicken Chunks 1.8.+ (by covers1624)
Project Red - Transmission (by MrTJP)
Valhelsia Structures (by ValhelsiaTeam)
YUNG's Better Strongholds (Forge) (by YUNGNICKYOUNG)
Refined Storage Addons (by raoulvdberge)
Titanium (by Buuz135)
Mouse Tweaks (by YaLTeR)
Upgrade Aquatic (by TeamAbnormals)
Dynamic Surroundings (by OreCruncher)
Storage Drawers (by Texelsaur)
Travel Anchors (by CastCrafter)
Clumps (by Jaredlll08)
Immersive Posts (by TwistedGate)
GeckoLib (by ThanosGecko)
Inventory HUD+ (by dmitrylovin)
FramedBlocks (by XFactHD)
Crafting Station (by tfarecnim)
Tumbleweed (by bconv)
Betterlands (by Sajevius)
Enhanced Mushrooms (by team_aurora_modding)
Villager Names (Forge) (by Serilum)
Xaero's Minimap (by xaero96)
More Storage Drawers (by RydelFox)
Citadel (by sbom_xela)
CodeChicken Lib 1.8.+ (by covers1624)
Nature's Compass (by Chaosyr)
Pipez (by henkelmax)
SuperMartijn642's Config Lib (by SuperMartijn642)
Ender Crop (by DrManganese)
CB Multipart (by covers1624)
Exotic Birds (by ThePavoReality)
NetherPortalFix (by BlayTheNinth)
Mystical World (by Noobanidus)
JEITweaker (by Jaredlll08)
Creatures and Beasts (by joosh_7889)
Engineer's Tools (by wilechaote)
BetterNether Reforged (by someoneelsewastaken)

Tekkland

Abundance

AI Improvements

Alex's Delight

Alex's Mobs

AppleSkin

Aquaculture 2

Aquafina

Architectury API

Atmospheric

AutoRegLib

Autumnity

Bamboo Blocks

Bamboo Everything

Bayou Blues

Better Burning

BetterDefaultBiomes

BetterEnd Reforked

BetterF3

Betterlands

BetterNether Reforged