How do I install Alterna?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Alterna work with?

The listing gives Minecraft 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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Alterna

Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.

by lycanlucy · on Modrinth

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

Alterna is a mod that aims to transform the game bit by bit, one "phase" at a time.

Each phase will have many versions released to add onto the theme, almost like this mod's version of game drops.

Please check the changelogs for more information, they're very detailed!

You can also join the Discord server to keep up with news or share feedback.

Dev Team

lycanlucy

Art Team

VitreousGlassy | ianaduarte | cw.png | OyamaCallista | Decadenza

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as alterna-1.3.1.jar — drop this file into the mods folder
Download size: 2.9 MB
Download link checked 2 Nov 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21