ModsFinder

UraniumContaminationEra-II

by SolusTek

UraniumContaminationEra-II is a NeoForge technology mod for 1.21.1 that fuses an RPG layer with a nuclear progression, from copper age to reactor operation.

NeoForgeClient and serverMIT LicenseOpen source1.21.1

What it does

Progression runs through a tech tree of metals, reactors and growth. Pure metals, rare metals, lanthanides and actinides are spread across the world, and each new ore tier opens the next step of the tree. The material system includes 86 pure metals, base and rare metals, and 28 alloys, with bronze and Zircaloy cladding for eight fuel rod types, each made as plate, dust, nugget or block.

A centerpiece multiblock reactor runs a full heat simulation and renders its model from OBJ files. Real-time temperature data can be read with Jade or WTHIT. A built-in PlayerStats system tracks nine visible attributes, including health, stamina, strength and the heat, cold and toxin resistances, along with hidden radiation and toxin values. Stamina replaces the vanilla hunger bar as the core action resource, and it grows permanently as the player sprints, jumps, kills mobs and breaks blocks.

The world pushes back with radiation zones, hostile biomes and creatures that inflict toxin accumulation. Potassium Iodide, Prussian Blue and DTPA injections counter the effects, while Adrenaline and OEC Combat Stimulant give short bursts of stats with a withdrawal penalty when they wear off. The mod is released under the MIT License and is open source. It is installed on the client and on the server, so both sides need it.

Key features

  1. Tiered metal progression

    Ores are scattered across the world, and each rarer tier opens the next step of the tech tree.

  2. Multiblock reactor

    A large reactor with full heat simulation shows real-time temperature readouts through Jade or WTHIT.

  3. PlayerStats attributes

    Nine visible attributes and hidden radiation and toxin values track the player's condition.

  4. Radiation and toxin counters

    Potassium Iodide, Prussian Blue, DTPA and combat stimulants answer exposure from zones and creatures.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
1.21.10.1.1-alpha.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Nuclear Age is also a NeoForge mod for 1.21.1, open source under the MIT License and published for the same client and server environment. Hbm's Nuclear Tech: Neo Edition is open source under the GNU Lesser General Public License v3.0 only, and it targets the same version. Nuclearism is closed under All rights reserved, while Nuclear Age and Hbm's Nuclear Tech are open source.

ModLoadersGame versionsEnvironmentUpdated
UraniumContaminationEra-IINeoForge1.21.1Client and server2026-07-10
Nuclear AgeNeoForge1.21.1Client and server2025-05-06
Hbm's Nuclear Tech: Neo EditionNeoForge1.21.1Client and server2026-07-18
NuclearismNeoForge1.21.1Client and server2026-08-31

Questions

Which loader does UraniumContaminationEra-II use?

The mod is published for NeoForge only, with a single file for 1.21.1.

Does the server need UraniumContaminationEra-II?

Yes. A server running it needs every connecting player to have it too.

Where can the source code and issues be found?

Public links exist for the source code and the issue tracker.

In the catalog

UraniumContaminationEra-II is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Similar mods

What the author says

A NeoForge Minecraft mod built around nuclear technology, fusing Tech, RPG, and Exploration into one experience. A massive material system: 86 pure metals (base metals, scattered rare metals, lanthanides, actinides), 28 alloys (from bronze to Zircaloy cladding), and 8 fuel rod types — each with…
SolusTek, on the Modrinth page

Official listing

Owner
SolusTek
Published
2026-07-10
Updated on Modrinth
2026-07-10
Facts verified
2026-10-15

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