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Complementary SMP ModpackMinecraft modpack for 1.21.11

A fully optional, vanilla-focused modpack, designed specifically to provide the best gameplay and visual quality for members of the ComplementarySMP, enabling server side features, and allowing you to enjoy the SMP to its fullest.

client onlynewest supported 1.21.11OptimizationLightweightMultiplayer
Latest version
1.21.11
Minecraft
1.19.4 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
CC-BY-NC-SA-4.0
Downloads
41.4k
Updated
1 mo ago
Available on
Modrinth

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Complementary SMP Modpack declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21Fabric21+declared13 Jun 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023
1.19.4Fabric17+declared14 Mar 2023

Download

From Complementary SMP Modpack’s own host. Nothing is re-hosted here.

1.21.11release28 Dec 2025

CompSMP Modpack 1.21.11.mrpack · 1.7 MB · for 1.21.11

Download latest
a0a13dee59ad…
Older versions20
  • 1.21.74 Oct 20251.21.788.8 MB3.7k downloads9f80000aec04…Get
  • 1.21.5b9 Jul 20251.21.587.6 MB2.7k downloads1d91620b5605…Get
  • 1.21.5a8 Jul 20251.21.590.4 MB136 downloads7f747e82a871…Get
  • 1.21.426 Apr 20251.21.4104.8 MB3.4k downloads29d1cc44627c…Get
  • 21.0.129 Jul 20241.2190.0 MB9.2k downloads0d1f1e4949d0…Get
  • 20.0.116 Jun 20241.20.415.2 MB617 downloadsa9ee01811bce…Get
  • 2.0_a130 Mar 20241.20.416.4 MB301 downloads542bdadcd2d4…Get
  • 1.5.226 Oct 20231.20.221.0 MB156 downloads9de7798a92d3…Get
  • 1.5.110 Sept 20231.20.16.1 MB2.7k downloadsca69e900725a…Get
  • 1.4.125 Jun 20231.20.117.6 MB333 downloads63e180d0d48e…Get
  • 1.4b20 Jun 20231.20.1162.9 MB240 downloads10ec80d9ef99…Get
  • 1.324 May 20231.19.415.3 MB516 downloads9070c6b960ab…Get
  • 1.2.124 Apr 20231.19.413.7 MB192 downloads3d20d8840b7f…Get
  • 1.224 Apr 20231.19.413.7 MB162 downloads1a6a2712bcf3…Get
  • 1.115 Apr 20231.19.45.1 MB212 downloads6491b281a8ee…Get
  • 1.0.211 Apr 20231.19.45.2 MB147 downloadsf5055d36a716…Get
  • 1.0.111 Apr 20231.19.44.9 MB149 downloads598152d4b156…Get
  • 1.08 Apr 20231.19.44.9 MB193 downloads3c2eae4b4dd2…Get
  • 0.38 Apr 20231.19.44.7 MB177 downloads53758f301fd9…Get
  • 0.26 Apr 20231.19.44.7 MB257 downloads4220a76872af…Get

Frequently asked

Does Complementary SMP Modpack work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Complementary SMP Modpack 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 Complementary SMP Modpack support?

Everything the author has declared, from 1.19.4 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 Complementary SMP Modpack on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which loader does Complementary SMP Modpack 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 Complementary SMP Modpack?

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 Complementary SMP Modpack under?

CC-BY-NC-SA-4.0, 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 Complementary SMP Modpack?

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 Complementary SMP Modpack 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)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 viJust Enough OptimizationJust Enough Optimization - Focused on low memory usage and higher avarege fps. Made for low-end pc so everyone can run MinecraftOptimized MaximaThis modpack made for optimization vanilla and fix many bugs. Based on Vanilla Extension modpack, but without decorations stuff.

Last checked 21 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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