Nuclearism

A Mod for Minecraft Neoforge 1.21.1 that adds brand new ores machinery and nuclear tech! Similar To HBM Nuclear Tech Mod but for 1.21.1 Neoforge

654 Downloads

neoforgegame-mechanicstechnologyutility

Rent Server with this Mod

Screenshots

Desert Base with production machines and a Nuclear Reactor

Steel ingot recipe and alloy furnace GUI

About this Mod

Nuclearism is a Nuclear Tech Related Mod for Minecraft 1.21.1 With some New Features such as Oil, Oil Refineries, Steel Alloy, Alloy Furnace, Lead, Uranium, Plutonium, Chicago Pile Nuclear Reactor, Research Reactor, Isotopes, Foundry, Mechanical Bore, Nuclear Bomb and a Radiation System!

Nuclearism has plans to become a larger and better Minecraft Nuclear tech mod for 1.21.1!

GECKOLIB REQUIRED

Available Versions

Nuclearism 1.4.7alpha

MC 1.21.1neoforge

May 22, 2026

Nuclearism 1.4.6alpha

MC 1.21.1neoforge

April 21, 2026

Nuclearism 1.4.5alpha

MC 1.21.1neoforge

April 20, 2026

Nuclearism 1.4.4alpha

MC 1.21.1neoforge

April 13, 2026

Nuclearism 1.4.3alpha

MC 1.21.1neoforge

April 12, 2026

How to Install Nuclearism on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "Nuclearism". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Nuclearism server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Nuclearism compatible with neoforge?

Nuclearism officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Nuclearism – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Nuclearism consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.