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modpack

ATOMLAND OptimizedMinecraft modpack for 1.21.11

1.21.11 & 26.x - Simple and fast open-source OptiFine alternative for modern loaders. Designed for players, content creators, and more

client and servernewest supported release 1.21.11OptimizationLightweight
Latest version
v2.2.0
Minecraft
1.16.5 to 1.21.11
Java
Java 21+
Loaders
Quilt, Fabric
Licence
BSD-3-Clause
Downloads
2.1k
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host ATOMLAND Optimized servers

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

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

Screenshots

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

Minecraft versions

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

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Quilt, Fabric21+declared9 Dec 2025
1.21.10Quilt, Fabric21+declared7 Oct 2025
1.21.5Fabric, Quilt21+declared25 Mar 2025
1.21.4Quilt, Fabric21+declared3 Dec 2024
1.21.3Quilt, Fabric21+declared23 Oct 2024
1.21.2Quilt, Fabric21+declared22 Oct 2024
1.21.1Quilt, Fabric21+declared8 Aug 2024
1.21Quilt, Fabric21+declared13 Jun 2024
1.20.6Quilt, Fabric21+declared29 Apr 2024
1.20.4Quilt, Fabric17+declared7 Dec 2023
1.20.2Fabric, Quilt17+declared20 Sept 2023
1.20.1Quilt, Fabric17+declared12 Jun 2023
1.20Quilt, Fabric17+declared2 Jun 2023
1.19.4Quilt, Fabric17+declared14 Mar 2023
1.16.5Quilt, Fabric8+declared14 Jan 2021

Download

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

Most recently published release

v2.2.0release24 Aug 2026

AO 1.21.11 v2.2.0.mrpack · 0.6 MB · for 1.21.11 · Fabric

Download this release
56ecc2ccf4b4…
Older versions22
  • 2.1.020 Jan 20261.21.16.9 MB188 downloads48cb1685ee39…Get
  • 2.0.020 Jan 20261.212.4 MB21 downloadse5998f682d01…Get
  • 1.4.84 Jan 20261.21.1034 KB78 downloadsed3a0e68eb97…Get
  • 1.4.719 Jul 20251.21.542 KB109 downloads9424c6612894…Get
  • 1.4.613 Feb 20251.21.44.5 MB149 downloadsb635567af957…Get
  • 1.4.58 Dec 20241.21.34.5 MB90 downloads5ccde82d2edf…Get
  • 1.4.419 Nov 20241.21.34.8 MB56 downloads120403c61914…Get
  • 1.4.331 Oct 20241.21.18.6 MB88 downloads3206cac2760b…Get
  • 1.4.225 Oct 20241.21.311 KB60 downloadsa7e511d1f944…Get
  • 1.4.125 Oct 20241.21.218 KB47 downloads2a1f251a6cd6…Get
  • 1.4.023 Oct 20241.21.14.5 MB45 downloadsc8f88f6941d1…Get
  • 1.3.928 Sept 20241.21.14.5 MB49 downloads67e24285174c…Get
  • 1.3.89 Sept 20241.16.516.2 MB97 downloadsa70e2c6ef842…Get
  • 1.3.75 Sept 20241.21.14.4 MB55 downloads7a7ea2c1c58f…Get
  • 1.3.610 Aug 20241.20.440 KB61 downloadsddb1bf9e826e…Get
  • 1.3.510 Aug 20241.20.440 KB114 downloadsf00e886530b6…Get
  • 1.3.010 Aug 20241.211.0 MB55 downloads303495b5a84a…Get
  • 1.2.07 May 20241.20.657 KB74 downloads559a584f6fd3…Get
  • 1.1.513 Apr 20241.20.49 KB67 downloadsb90fa69112ce…Get
  • 1.1.012 Apr 20241.20.10.9 MB60 downloadsefa47b820710…Get
  • 1.0.512 Apr 20241.20.48 KB45 downloads91456976d74b…Get
  • 1.0.010 Apr 20241.16.5102 KB68 downloads560711802487…Get

Frequently asked

Does ATOMLAND Optimized work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version ATOMLAND Optimized 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 ATOMLAND Optimized support?

Everything the author has declared, from 1.16.5 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 ATOMLAND Optimized 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 platform or loader does ATOMLAND Optimized support?

Quilt, Fabric. 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 ATOMLAND Optimized?

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.

What licence is ATOMLAND Optimized under?

BSD-3-Clause, 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 ATOMLAND Optimized?

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 ATOMLAND Optimized safely?

Start with the author's page on Modrinth, 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.

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.PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.香草精华 Vanilla EssenceFaithful to the origional. Better vanilla experience without any new blocks or mobsElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔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 vi

Details from Modrinth, where the author last updated it on 24 Aug 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .