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Arctics Undertale SoulsMinecraft mod for 1.21.11

This mod was made from an idea I have had for a long time where you can be a human and or monster from Undertale. You can use Monster or Human magic to make your way through the world. You can either be enemys or friends its your choice.

client and servernewest supported release 1.21.11Game MechanicsWorldgenMagic
Latest version
1.1.8-5
Minecraft
1.20.1 to 1.21.11
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
369
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Arctics Undertale Souls servers

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

  • 1.21.11
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • 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 Arctics Undertale Souls declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11NeoForge, Forge21+declared9 Dec 2025
1.21.10Forge, NeoForge21+declared7 Oct 2025
1.21.9Forge, NeoForge21+declared30 Sept 2025
1.21.8Forge, NeoForge21+declared17 Jul 2025
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From Arctics Undertale Souls’s own host. Nothing is re-hosted here.

For Minecraft 1.21.11

Choose the loader you use before downloading.

  • NeoForge

    1.0.9 · 8 Jan 2026 · AUM-1.0.9-neoforge-1.21.8.jar

    Get NeoForge

Most recently published release

1.1.8-5release18 Sept 2026

AUM-1.1.8-5-forge-1.20.1.jar · 2.3 MB · for 1.20.1 · Forge

Download this release
bcc1561a067a…
Older versions6
  • 1.1.813 Sept 20261.20.12.2 MB7333170dcc11…Get
  • 1.1.414 Jun 20261.21.81.6 MB25 downloadsb67f24587ed9…Get
  • 1.1.313 Jun 20261.21.81.6 MB7 downloadsd7d097445c0a…Get
  • 1.1.210 Jun 20261.21.81.6 MB6 downloads18044e04bc0b…Get
  • 1.1.14 May 20261.21.81.5 MB20 downloads405d4cf4205c…Get
  • 1.0.98 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.81.2 MB182 downloadsaf895bf52be0…Get

Frequently asked

Does Arctics Undertale Souls work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Arctics Undertale Souls 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 Arctics Undertale Souls support?

Everything the author has declared, from 1.20.1 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 Arctics Undertale Souls 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 Arctics Undertale Souls support?

NeoForge, Forge. 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 Arctics Undertale Souls?

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 Arctics Undertale Souls 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 Arctics Undertale Souls?

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 Arctics Undertale Souls 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.

Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Details from Modrinth, where the author last updated it on 18 Sept 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? .