CurseForge · Minecraft mod
Nuclear Craft UPdated
A modern port of NuclearCraft for 1.21 featuring advanced nuclear reactors, realistic fuel processing, and complex radiation mechanics for high-tech gameplay.
Quick answer
Which Nuclear Craft UPdated release should I use?
Nuclear Craft UPdated NuclearCraft-1.21.1-1.4.0.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Nuclear Craft UPdated required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Nuclear Craft UPdated NuclearCraft-1.21.1-1.4.0.jar need?
NuclearCraft-1.21.1-1.4.0.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Nuclear Craft UPdated without breaking your instance.
Built for Nuclear Craft UPdated NuclearCraft-1.21.1-1.4.0.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use NuclearCraft-1.21.1-1.4.0.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside NuclearCraft-1.21.1-1.4.0.jar. It opens that exact file at the source.
About this project
What does Nuclear Craft UPdated add?
NuclearCraft (1.21 Port of https://www.curseforge.com/minecraft/mc-mods/nuclearcraft-neoteric)
This project brings the classic NuclearCraft experience to Minecraft 1.21, reintroducing advanced nuclear technology, complex resource chains, and high-risk/high-reward energy systems for modern gameplay.
⚛️ Features
Fission Reactors
Build customizable multiblock fission reactors using various fuels. Manage heat, efficiency, and cooling to prevent meltdowns while maximizing power output.Fusion Reactors (Endgame)
Unlock powerful fusion technology for massive energy production once you progress far enough.Advanced Fuel Processing
Refine raw materials into nuclear fuels through multi-step processes, including isotope separation and fuel fabrication.Radiation System
Exposure to radiation adds a survival challenge—players must use protective gear and manage contamination carefully.New Ores & Materials
Adds uranium, thorium, and other nuclear-related resources, expanding mining and crafting progression.Machines & Automation
Includes processors, centrifuges, and other machines to automate complex production chains.
🎮 How This Changes Gameplay
This mod transforms Minecraft from a simple survival experience into a technical engineering challenge:
Players must plan and design reactor layouts, balancing efficiency and safety.
Progression becomes deeper, requiring long-term resource management and automation.
Mistakes have consequences—reactor failures and radiation leaks can damage your world and character.
Encourages large-scale builds and infrastructure, making it ideal for tech-focused playthroughs and modpacks.
🌍 What Makes This Mod Unique
Unlike basic power-generation mods, NuclearCraft emphasizes realistic systems and meaningful complexity. Every step—from mining uranium to stabilizing a reactor—requires thought, experimentation, and optimization.
Whether you're creating a compact power plant or a massive nuclear facility, this mod offers a rewarding experience for players who enjoy deep mechanics and engineering gameplay.
Project description from CurseForge.
Pick your setup
Nuclear Craft UPdated by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Nuclear Craft UPdated versions and loaders
NuclearCraft-1.21.1-1.4.0.jar
23 May 2026
NuclearCraft-1.21.1-1.4.0.jar
9 May 2026
NuclearCraft-1.21.1-1.4.0.jar
2 May 2026
NuclearCraft-1.21.1-1.3.0.jar
25 Apr 2026
NuclearCraft-1.21.1-1.3.0.jar
31 Mar 2026
NuclearCraft-1.21.1-1.3.0.jar
29 Mar 2026
NuclearCraft-1.21.1-1.3.0.jar
19 Mar 2026
NuclearCraft-1.21.1-1.3.0.jar
18 Mar 2026
Looking for an older file? The official CurseForge project page is in Resources.