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.
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
Tiered metal progression
Ores are scattered across the world, and each rarer tier opens the next step of the tech tree.
Multiblock reactor
A large reactor with full heat simulation shows real-time temperature readouts through Jade or WTHIT.
PlayerStats attributes
Nine visible attributes and hidden radiation and toxin values track the player's condition.
Radiation and toxin counters
Potassium Iodide, Prussian Blue, DTPA and combat stimulants answer exposure from zones and creatures.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
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.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| UraniumContaminationEra-II | NeoForge | 1.21.1 | Client and server | 2026-07-10 |
| Nuclear Age | NeoForge | 1.21.1 | Client and server | 2025-05-06 |
| Hbm's Nuclear Tech: Neo Edition | NeoForge | 1.21.1 | Client and server | 2026-07-18 |
| Nuclearism | NeoForge | 1.21.1 | Client and server | 2026-08-31 |
Questions
Which loader does UraniumContaminationEra-II use?
Does the server need UraniumContaminationEra-II?
Where can the source code and issues be found?
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…
Official listing
- Modrinth page
- modrinth.com/mod/uraniumcontaminationera-ii
- Owner
- SolusTek
- Published
- 2026-07-10
- Updated on Modrinth
- 2026-07-10
- Facts verified
- 2026-10-15
