FTB Unstable
Modpackby FTB
The most up to date and hot off the press mods in all of Modern Minecraft for Unstable 1.21!
Type
Modpack
CurseForge Downloads
5,134
CurseForge ID
1078005
Last Updated
Jun 25, 2026
Description
Introducing Unstable 1.21!
Welcome to Unstable 1.21, where the latest Minecraft version meets an even more sophisticated array of ported mods. We are proud to present the NeoForge version, offering you the chance to explore Minecraft's newest features.
Following the success of Unstable 1.20 and Earlier, Unstable 1.21 continues to serve as a cutting-edge testing ground, pushing the boundaries of Minecraft’s latest iteration. This pack invites you to dive deep into the latest features, mods, and updates that Minecraft has to offer, providing a unique and dynamic gameplay experience for those who seek more than just the ordinary.
MC 1.21 has faced challenges with versioning and many mods still actively porting to NeoForge, but we persevered and delivered a pack that embraces the bleeding edge of development. Now, with FTB Unstable 1.21, we're elevating that experience even further. This pack allows us to experiment with and refine new mods while inviting you to join us in uncovering hidden gems and addressing any issues that arise.
Prepare yourself for an adventurous exploration of Minecraft's latest version. Unstable 1.21 serves as a sandbox for delving into the intricacies of the game’s updated features. Unleash your curiosity and witness firsthand how these elements interact and harmonize with the exceptional mods available. Let the unpredictable gameplay take you on a captivating journey where the unknown becomes a source of exhilaration.
While support for FTB Unstable 1.21 may be limited due to its dynamic nature, you’re never alone in this journey. Assistance is always available on our Discord.
Join us on this exciting adventure, where you can experiment with the latest Minecraft features and contribute to the ongoing bug-fixing process. FTB Unstable 1.21 fosters collaboration and camaraderie, offering a platform for enthusiasts like you to shape the future of Minecraft through your valuable experiences.
- Tons of custom worldgen, new structures to explore and wild expanses thanks to William Wyther's Overhauled Overworld along with Tectonic as well as a handful of well polished terrain and structure expansion mods. Along with lootr, you and your friends will be able to explore and loot for days!
- Expand your technological innovations with Modern Industrialization and Mekanism.
- Extract and Build with Xycraft.
- Get Magical with Ars Nouveau, Theurgy, and Occultism.
So, embrace the ever-evolving frontiers of Unstable 1.21 and unlock the endless possibilities that await. Immerse yourself in a world of discovery, where challenges are met head-on, and innovation thrives!
Support
- For Modpack issues, please go here: https://go.ftb.team/support-modpack
- For Mod issues, please go here: https://go.ftb.team/support-mod-issues
- Just got a question? Check out our Discord: https://go.ftb.team/discord
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Just Enough Items (JEI)
View Items and Recipes
GeckoLib
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Clumps XP orbs together to reduce lag
FancyMenu
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Cupboard
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Just another boring library mod.
Farmer's Delight
A cozy expansion to farming and cooking!
FTB Library (NeoForge)
Common code for all GUI stuff in FTB Mods
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Custom, Emissive and Varied mobs like Optifine and so much more.. +Player skin features!)
Kotlin for Forge
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[EMF] Entity Model Features [Fabric & Forge]
EMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.
Resourceful Lib
Lib for Team Resourceful and more
Comforts
Adds sleeping bags and hammocks for, respectively, portability and turning day to night, without setting new spawns. Com...
Nature's Compass
Nature's Compass is an item that allows you to locate biomes anywhere in the world.
Embeddium
A powerful, mod-friendly, FOSS client performance mod for NeoForge
Polymorph (Fabric/Forge/Quilt)
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FTB Teams (NeoForge)
Library for mods that can utilize team progression
CreativeCore
a core mod
spark
spark is a performance profiler for Minecraft clients, servers and proxies.
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Config Lib makes dealing with config files just a bit easier.
SuperMartijn642's Core Lib
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Lootr (Forge & NeoForge)
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Iceberg [Neo/Forge]
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A fork of Mozilla's Rhino library, modified for use in mods
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Resourceful Config
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FTB XMod Compat
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Drippy Loading Screen
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Athena
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Handcrafted
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Toast Control
Control toasts, those popups in the corner!
Cristel Lib
A Library mod for easy structure config and runtime datapacks.
NetherPortalFix
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Default Options
A way for modpacks to ship a default (key) configuration without having to include an options.txt file.
Better Compatibility Checker
Changes the default server compatability check to compare modpack versions
Chipped
Every block deserves a friend.
Apothic Attributes
A library mod providing Attributes and related things.
Prism [Neo/Forge]
A library all about color! Provides lots of color-related functionality for dependent mods.
Applied Energistics 2
A Mod about Matter, Energy and using them to conquer the world..
Legendary Tooltips [Neo/Forge]
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Load My F***ing Tags
Prevents Incorrect Tag Entries from breaking an entire Tag
Yeetus Experimentus
Yeetus Experimental Settings
Crafting Tweaks
Allows you to rotate, balance or clear the crafting matrix by the press of a button, in any (supported) crafting window.
FTB Ultimine (Forge)
Harvest multiple blocks at once
FastWorkbench
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Completely removes recipe book from the game, optimizing player data.
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Mekanism
High-tech machinery, powerful energy generation, fancy gadgets and more. Now on Curse!
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A collection of Gadgets to make building large structures a little bit easier!
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Adds a multiblock kitchen that shows recipes you can make with what ingredients you have available.
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ConnectedTexturesMod
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Modular Routers
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Durability Tooltip shows you the durability of an item!
Integrated Tunnels
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Forbidden and Arcanus
Adds magical themed Content!
Polymorphic Energistics
Polymorph support for Applied Energistics 2.
Bridging Mod
Reacharound Placement (Bedrock Bridging) for Forge, Fabric, & Quilt
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Simple Discord Rich Presence
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Doing cool stuff with pressurized air
Tectonic
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Traveler's Backpack
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Time in a bottle [FORGE\NEOFORGE\FABRIC]
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Inventory Essentials
The most essential inventory tweaks. Now with sorting!
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MSS - Moog's Soaring Structures
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Simple Weather
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JustHammers
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XyCraft
Sci-fi Aesthetics and Technology
XyCraft: World
World Generation for XyCraft
Default Server Properties
Allows modpack developers to define default server properties. Typically used for things like a default level type.
CleanView
CleanView is a minecraft client mod that removes potion particles from your viewpoint
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Support stacked cooking & optimize recipe-matching in Farmer's Delight
Repeatable Trial Vaults
Consume a trial key to be able to use the trial vault again
DimStorage
DimStorage with DimChest and DimTank
Laser Bridges & Doors [Fabric/Forge/NeoForge]
Adds Laser Source Block which when powered creates laser platforms and doors
Redstone Pen
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Simple tiered mass item storage.
Transmog
Change the appearance of your items without modifying their behavior/stats!
XyCraft: Override
Vanilla modifications in XyCraft style!
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An addon mod that extends the content in Modern Industrialization
CreeperHost Presents Soul Shards
Soul Shards is a simple mod that allows you to gather the souls of the creatures you slay into gem fragments
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Machines and technology in XyCraft Style!
Nolijium
Various QoL enhancements by Nolij
Squat Grow (Shift / Twerk to grow plants)
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Snad
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A little decorative and functional mod
Noisium (archived)
Optimises worldgen performance for a better gameplay experience.
Jump Over Fences
Don't let walls and fences stop you! Jump over them!
Inventory Totem
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Light Overlay (Rift/Forge/Fabric)
A simple mod to provide users with NEI-like light level overlay.
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Minecraft mod that shows an ItemStack's mod name on its tooltip.
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Low fire on your screen! Vanilla Friendly
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Bow Infinity Fix (Forge/Fabric)
Removes need to have an arrow in your inventory to use the Infinity enchant on your bow or crossbow
Slightly Improved Font (32x)
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Camera Mod
A working Camera in Minecraft!
FTB Backups 2
Updated verson of FTB Backups.
Spice of Life Onion
A mod designed to encourage dietary variety!
Mahou Tsukai
A magic mod focused on special effects and spell uniqueness
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Never get annoyed by bartering anymore!
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Additions module for Mekanism, contains things that don't quite fit in the other modules.
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IC2Classics Config Library
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Allows you to bunch together flowers into a single blockspace similar to pickles
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William Wythers' Overhauled Overworld
This mod overhauls all vanilla biomes, with different sub biomes!
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Armor trims will now give some special effect
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Removes the level cap in the Anvil GUI
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A hopper for transferring fluids
JAOPCA
Just A Ore Processing Compatibility Attempt
Flourish
Use bonemeal to spread small flowers. Previously known as Flora Doubling.
Darker Pipez
Replaces the bright Pipez textures with darker, more subtle tones. Say goodbye to visual clutter and hello to sleek, str...
Trample Stopper
Stop Farmland form getting trampled
Tool Kit
Adds useful commands and improves the vanilla structure blocks - ToolKit
Minis
Adds mini player mobs
Simple Teleporters Reforged
Simple Teleporters adds a craftable teleporter block to quickly travel your world!
Curios API Continuation [Frozen]
A flexible and expandable accessory/equipment API for users and developers [Frozen]
SolarGeneration
Produce FE from the sun, use your head for recharging your inventory
Mekanism Turrets & Fences
Turrets and Fences in Mekanism!
WeatherGate
Weather Gate
Cottonly
It Adds Cotton
Genetics: Resequenced
Extract mobs' Genes to gain their powers!
Enchantable Blocks
Allows enchanting of some blocks to change how they function
The Magic Doorknob
Who needs a door when you have a magic doorknob?
Player Plates (Obsidian Plates)
Adds Extra Pressure plates
Keep My Soil Tilled
🌱 Keeps farmland soil tilled below a stem block (melon/pumpkin) after harvesting.
Solar Cooker
Solar Cooker / Furnace - Cooking without fuel (Forge, NeoForge, Fabric, Quilt)
Pet Slow
Mini Slow
Health Indicator TXF
Health indicator on player screen
Blue's Better Monsters
New models and animations, shapeshifting creepers, dismemberment and more!
Ariadne's Thread
A magic yarn that shows you where you've been

