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modpack

Lost World:ARGMinecraft modpack for 1.21.1

An ARG build for Minecraft that adds the creepy atmosphere of old Minecraft versions.

client and servernewest supported release 1.21.1AdventureChallenging
Latest version
1.5
Minecraft
1.21.1
Java
Java 21+
Loader
NeoForge
Licence
LicenseRef-All-Rights-Reserved
Downloads
2.3k
Updated
4 d ago
Available on
Modrinth
Space NodeOur hosting

Host Lost World:ARG servers

One click and Lost World:ARG is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • 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 Lost World:ARG declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge21+declared8 Aug 2024

Download

From Lost World:ARG’s own host. Nothing is re-hosted here.

Most recently published release

1.5release5 Nov 2026

Lost World ARG 1.5.mrpack · 122.3 MB · for 1.21.1 · NeoForge

Download this release
3c7d78cbab5d…
Older versions6
  • 1.426 Jul 20261.21.1122.3 MB41 downloadse6a18e3724dc…Get
  • 1.3-hotfix18 Jun 20261.21.1122.3 MB225 downloads4a09a5029ead…Get
  • 1.316 Jun 20261.21.1122.3 MB34 downloads3be0fb906e0e…Get
  • 1.228 Jan 20261.21.1118.6 MB854 downloads1dd22bdadfa0…Get
  • 1.119 Jan 20261.21.1121.9 MB35 downloads19bbd18412a2…Get
  • 1.010 Jan 20261.21.1121.9 MB62 downloads4d246d92df3c…Get

Frequently asked

Does Lost World:ARG work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Lost World:ARG declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Do I need to install Lost World:ARG 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 Lost World:ARG support?

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 Lost World:ARG?

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 Lost World:ARG 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 Lost World:ARG?

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 Lost World:ARG 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.

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Details from Modrinth, where the author last updated it on 5 Nov 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

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