mod
Extreme ReactorsMinecraft mod for 1.21.4
This is a port of the Big Reactors mod by Erogenous Beef to the current Minecraft versions
- Latest version
- ExtremeReactors2-1.21.1-2.4.28.jar
- Minecraft
- 1.9.4 to 1.21.4
- Java
- Java 21+
- Loaders
- Forge, NeoForge
- Licence
- not stated
- Downloads
- 99.8M
- Updated
- 10 mo ago
- Available on
- CurseForge
Screenshots
Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.
Minecraft versions
Every version Extreme Reactors declares support for, newest first, with the Java runtime that version needs.
| Minecraft | Through | Java | Evidence | Released |
|---|---|---|---|---|
| 1.21.4 | Forge, NeoForge | 21+ | declared | 3 Dec 2024 |
| 1.21.1 | NeoForge, Forge | 21+ | declared | 8 Aug 2024 |
| 1.21 | NeoForge, Forge | 21+ | declared | 13 Jun 2024 |
| 1.20.6 | NeoForge, Forge | 21+ | declared | 29 Apr 2024 |
| 1.20.1 | Forge, NeoForge | 17+ | declared | 12 Jun 2023 |
| 1.20 | Forge, NeoForge | 17+ | declared | 2 Jun 2023 |
| 1.19.2 | NeoForge, Forge | 17+ | declared | 5 Aug 2022 |
| 1.19.1 | Forge, NeoForge | 17+ | declared | 27 Jul 2022 |
| 1.19 | NeoForge, Forge | 17+ | declared | 7 Jun 2022 |
| 1.18.2 | NeoForge, Forge | 17+ | declared | 28 Feb 2022 |
| 1.18.1 | Forge, NeoForge | 17+ | declared | 10 Dec 2021 |
| 1.18 | NeoForge, Forge | 17+ | declared | 30 Nov 2021 |
| 1.17.1 | NeoForge, Forge | 16+ | declared | 6 Jul 2021 |
| 1.16.5 | NeoForge, Forge | 8+ | declared | 14 Jan 2021 |
| 1.16.4 | Forge, NeoForge | 8+ | declared | 29 Oct 2020 |
| 1.16.3 | NeoForge, Forge | 8+ | declared | 10 Sept 2020 |
| 1.12.2 | NeoForge, Forge | 8+ | declared | 18 Sept 2017 |
| 1.12 | NeoForge, Forge | 8+ | declared | 2 Jun 2017 |
| 1.11.2 | NeoForge, Forge | 8+ | declared | 21 Dec 2016 |
| 1.10.2 | Forge, NeoForge | 8+ | declared | 23 Jun 2016 |
| 1.9.4 | NeoForge, Forge | 8+ | declared | 10 May 2016 |
For Minecraft 1.21.4
Choose the loader you use before downloading.
- Get NeoForge
NeoForge
ExtremeReactors2-1.21.4-2.4.20.jar · 13 Mar 2025 · ExtremeReactors2-1.21.4-2.4.20.jar
Most recently published release
ExtremeReactors2-1.21.1-2.4.28.jar · 2.4 MB · for 1.21.1 · NeoForge
b017d5d0cf5d…Older versions24Hide older versions
- ExtremeReactors2-1.20.1-2.0.97.jar17 Dec 20251.20.12.5 MB
0e7877f58d4f…Get - ExtremeReactors2-1.21.1-2.4.27.jar4 Dec 20251.21.12.4 MB837 downloads
02feae9ff7f8…Get - ExtremeReactors2-1.20.1-2.0.96.jar4 Dec 20251.20.12.5 MB
2bc443a07137…Get - ExtremeReactors2-1.21.1-2.4.26.jar11 Oct 20251.21.12.4 MB1.0k downloads
fe0dbffd784b…Get - ExtremeReactors2-1.20.1-2.0.95.jar11 Oct 20251.20.12.5 MB1.5k downloads
36229fe85feb…Get - ExtremeReactors2-1.21.1-2.4.25.jar24 Sept 20251.21.12.4 MB
eb9068b224f4…Get - ExtremeReactors2-1.20.1-2.0.94.jar24 Sept 20251.20.12.4 MB
0a79ea6b39ea…Get - ExtremeReactors2-1.21.1-2.4.24.jar15 Jul 20251.21.12.4 MB858 downloads
7e452977e4c1…Get - ExtremeReactors2-1.20.1-2.0.93.jar15 Jul 20251.20.12.4 MB46 downloads
2db6078bdc47…Get - ExtremeReactors2-1.21.1-2.4.23.jar13 Jun 20251.21.12.4 MB838 downloads
6334febf400d…Get - ExtremeReactors2-1.21.1-2.4.22.jar24 Apr 20251.21.12.4 MB353.4k downloads
ac6a17f763ea…Get - ExtremeReactors2-1.21.4-2.4.20.jar13 Mar 20251.21.42.4 MB3.0k downloads
d953323d4bb7…Get - ExtremeReactors2-1.20.1-2.0.92.jar28 Feb 20251.20.12.4 MB947.9k downloads
ced26ec75cb2…Get - ExtremeReactors2-1.21.1-2.4.21.jar4 Feb 20251.21.12.4 MB1.8M downloads
9c2488c412c8…Get - ExtremeReactors2-1.21.1-2.4.20.jar25 Jan 20251.21.12.4 MB201.2k downloads
23c2bcc151a5…Get - ExtremeReactors2-1.20.1-2.0.91.jar25 Jan 20251.20.12.4 MB448.5k downloads
2fab59a3f251…Get - ExtremeReactors2-1.21.4-2.4.19.jar12 Jan 20251.21.42.4 MB2.8k downloads
9234376fbc87…Get - ExtremeReactors2-1.21.1-2.4.19.jar4 Jan 20251.21.12.4 MB410.4k downloads
19c4586968a3…Get - ExtremeReactors2-1.21.1-2.4.18.jar7 Dec 20241.21.12.4 MB528.8k downloads
d2107a45afa8…Get - ExtremeReactors2-1.21.1-2.4.17.jar4 Dec 20241.21.12.4 MB56.3k downloads
2592b14ab0b2…Get - ExtremeReactors2-1.21.1-2.4.16.jar1 Dec 20241.21.12.4 MB24.7k downloads
385ed7576356…Get - ExtremeReactors2-1.21.1-2.4.15.jar17 Nov 20241.21.12.4 MB202.2k downloads
55444146d352…Get - ExtremeReactors2-1.20.1-2.0.90.jar17 Nov 20241.20.12.4 MB461.9k downloads
5417d8898b97…Get - ExtremeReactors2-1.21.1-2.4.14.jar9 Nov 20241.21.12.4 MB102.6k downloads
84e1298896a8…Get
Frequently asked
Does Extreme Reactors work on Minecraft 1.21.4?
Yes. 1.21.4 is the newest Minecraft version Extreme Reactors declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.
Which Minecraft versions does Extreme Reactors support?
Everything the author has declared, from 1.9.4 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.
Which platform or loader does Extreme Reactors support?
Forge, NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for Extreme Reactors?
Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.
How do I install Extreme Reactors?
Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.
Where do I download Extreme Reactors safely?
Start with the author's page on CurseForge, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.
Is this information wrong or missing something? .