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modpack

HReactorMinecraft modpack for 1.21.11

Optimized modpack, just an optimized modpack... Yep.

client and servernewest supported 1.21.11OptimizationLightweight
Latest version
26.7.28
Minecraft
1.21.10 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
71.6k
Updated
1 mo ago
Available on
Modrinth
Space NodeOur hosting

Host HReactor servers

One click and HReactor is installed with the right loader, on hardware built for it.

  • 1.21.11
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version HReactor declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025

Download

From HReactor’s own host. Nothing is re-hosted here.

26.7.28release28 Jul 2026

H-Reactor.mrpack · 5.5 MB · for 1.21.10

Download latest
1555599a49cd…
Older versions1
  • 2026.5.2323 May 20261.21.11257.4 MB418 downloads9d33018764eb…Get

Frequently asked

Does HReactor work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version HReactor 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 HReactor support?

Everything the author has declared, from 1.21.10 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install HReactor on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which loader does HReactor need?

Fabric. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for HReactor?

On the newest Minecraft release it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the modpack itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is HReactor under?

LicenseRef-All-Rights-Reserved, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install HReactor?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download HReactor safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 rc1 ✔fps+pvpFPS + PvP Boost is a lightweight Minecraft modpack designed to maximize performance and give players a competitive edge in PvP. With FPS-boosting optimizations and combat-focused tweaks, it delivers smoother gameplay, better responsiveness, and enhanced viPhoton OptimizationMinecraft optimization framework prioritizing performance, simplicity, and compatibility. 1.7.10-26.1.2 across Fabric, Forge, NeoForge, and Quilt!

Last checked 20 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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