Menu

mod

Hollow EngineMinecraft mod for 1.21.1

Powerful content creation framework for modpacks maps and servers. Features Kotlin scripting, in-game scripting IDE, advanced NPCs, dialogues, animations, and cutscenes all in one.

client and servernewest supported 1.21.1UtilityAdventureGame MechanicsLibrary
Latest version
2.2.1
Minecraft
1.18.2 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
CC-BY-NC-SA-4.0
Downloads
5.9k
Updated
18 d ago
Available on
Modrinth
Space NodeOur hosting

Host Hollow Engine servers

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

  • 1.21.1
  • NeoForge
  • Forge
  • Fabric
  • 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 Hollow Engine declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.19.2Fabric, NeoForge, Forge17+declared5 Aug 2022
1.19.1Forge, Fabric, NeoForge17+declared27 Jul 2022
1.19NeoForge, Forge, Fabric17+declared7 Jun 2022
1.18.2Fabric, NeoForge, Forge17+declared28 Feb 2022

Download

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

2.2.1release9 Jun 2026

HollowEngine-fabric-1.21.1-2.2.1.jar · 41.6 MB · for 1.21.1

Download latest
457e7c583371…
Older versions5
  • 2.2.0.15 Jun 20261.21.141.6 MB19 downloads5ddab4a7f5db…Get
  • 1.5.44 May 20241.19.2, 1.19.1, 1.194.4 MB3.2k downloads209e8a23bbe8…Get
  • 1.19.2-1.5.31 May 20241.19.2, 1.19.1, 1.194.4 MB556 downloads218d97a24ec2…Get
  • 1.18.2-1.1.122 Nov 20231.18.22.7 MB454 downloads7927b466a34b…Get
  • 1.06 Oct 20231.18.22.5 MB359 downloads9c5f4921ec58…Get

Frequently asked

Does Hollow Engine work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Hollow Engine 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 Hollow Engine support?

Everything the author has declared, from 1.18.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Hollow Engine 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 Hollow Engine support?

NeoForge, Forge, 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 Hollow Engine?

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

What licence is Hollow Engine 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 Hollow Engine?

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 Hollow Engine 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. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

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

Armor HiderHide or adjust the transparency of armor, glint, and offhand items - with full multiplayer sync. No dependencies required.BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!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.

Details from Modrinth, where the author last updated it on 15 Sept 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .