CurseForge · Minecraft mod
ZeroCore 2
Utility mod and multiblock API
Quick answer
Which ZeroCore 2 release should I use?
ZeroCore 2 ZeroCore2-1.21.1-2.4.21.jar targets 1.21.1 with NeoForge. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. No extra mods listed for this file.
Where it goes
Is ZeroCore 2 required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does ZeroCore 2 ZeroCore2-1.21.1-2.4.21.jar need?
ZeroCore2-1.21.1-2.4.21.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add ZeroCore 2 without breaking your instance.
Built for ZeroCore 2 ZeroCore2-1.21.1-2.4.21.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use ZeroCore2-1.21.1-2.4.21.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside ZeroCore2-1.21.1-2.4.21.jar. It opens that exact file at the source.
About this project
What does ZeroCore 2 add?
FAQ:
- Can I use ZeroCore as a dependency of my mod? Yes. Drop on discord if you have any question on how to use it
- Fabric ? Yes, I'm working on it. No ETA yet but it's coming
ZeroCore is a mod intended for other mod authors
It contains code to handle the basic mechanics of the game and Forge, including:
handlers to process network messages on the correct thread
new GUI system
a base TileEntity implementation that simplifiy data syncronization between server and remote clients, updates and GUI handling
helper classes and blockstate properties to handle connected textures
standard configuration handler with built-in support for in-game configs changes
standard ore generator and re-generation
much more
It's also the home of a revised multiblock API that support multiple client mods without performance penalities
MAVEN
ZC is available on my maven rep: https://maven.zerono.it/
PLAY ALONG WITH YOUR FRIENDS OR STREAM YOUR GAMEPLAY
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CONTACTS
Since many of you have asked, I've opened a Discord server. Ask questions about my mods, share your Reactors designs and report issues. You can also find me on the Minecraft Forge discord server or the Direwolf20 one. Happy chat.
MODPACKS AND LET'S PLAYs AND OTHER PERMISSIONS
You can add Zero Core to your mod pack or use them in your let's play / live streams to your heart content, no need to ask for my permission: you got it.
If you like, post a comment here or on the main forum thread to let's us know what fun stuff you are doing with the mods so we can all share in the fun.
No one is authorized to repost my mods, or any part of them, on any other website other then Curse Forge. If you wish, you can link to this page from your website to let your users download the mod.
A NOTE ON SAFETY
We release our mods only on the Curse client or the FTB launcher and on the following websites:
Curse Forge : https://minecraft.curseforge.com
Curse : https://mods.curse.com
If you found our mods on another website be sure that they do not come from us and we cannot guarantee that you are downloading something safe to use and that will work on your version of Minecraft. To keep things short: do not download those files and always use the Curse client or the FTB launcher or Curse / Curse Forge websites
TUTORIALS
A tutorial about the Multiblock API is available here:
http://zerono.it/zerocore-multiblock-api-tutorial/
It's not up-to-date but still relevant.
Project description from CurseForge.
Pick your setup
ZeroCore 2 by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.21
1 loader build1.20.6
1 loader build1.20.1
2 loader builds1.20
1 loader build1.19.2
1 loader build1.18.2
1 loader build1.16.5
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
ZeroCore 2 versions and loaders
ZeroCore2-1.21.1-2.4.21.jar
17 Dec 2025
ZeroCore2-1.20.1-2.1.48.jar
17 Dec 2025
ZeroCore2-1.21.1-2.4.20.jar
10 Oct 2025
ZeroCore2-1.21.1-2.4.18.jar
13 Jun 2025
ZeroCore2-1.21.1-2.4.17.jar
24 Apr 2025
ZeroCore2-1.21.4-2.4.16.jar
13 Mar 2025
ZeroCore2-1.21.1-2.4.16.jar
5 Feb 2025
ZeroCore2-1.21.4-2.4.15.jar
12 Jan 2025
ZeroCore2-1.21.1-2.4.14.jar
1 Dec 2024
ZeroCore2-1.21.1-2.4.13.jar
27 Oct 2024
ZeroCore2-1.20.1-2.1.47.jar
27 Oct 2024
ZeroCore2-1.21.1-2.4.11.jar
15 Oct 2024
Looking for an older file? The official CurseForge project page is in Resources.