How do I install Bygone Fortress Plus?

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 CurseForge — not every file is mirrored on our own servers.

What Minecraft version does Bygone Fortress Plus work with?

The listing gives Minecraft 1.21.1, 1.20.1. This is the version stated by the author or source site, not something we verified ourselves.

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Bygone Fortress Plus

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by cassiancc · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Fabric2 builds
Mod loader NeoForge1 build
Mod loader Forge1 build

Minecraft version

Minecraft 1.21.1Newest
Minecraft 1.20.1

Minecraft 1.21.1Newest

Minecraft 1.20.1Newest

⬇ Download for 1.21.1 · Fabric ⬇ Download for 1.20.1 · Fabric ⬇ Download for 1.21.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

The Title text "Bygone Fortress" set against a fortress.

Overview

Bygone Fortress Plus overhauls the vanilla fortress, giving it a more grand scope. This fortress was originally present in the Bygone Nether mod, then the Bygone Fortress mod, and now here in an updated port.

FAQ

Will this mod be ported to other versions/loaders?
- I had made this port for modpacks planned for 1.20.1 and 1.21.1 - I am interested in porting it beyond that point in the future, but no promises. No backports are planned/necessary, play the original mod.

License

Bygone Fortress Plus is available under the open source MIT License, matching the original mod.

Credits

This is a port of Bygone Fortress to Forge/Fabric 1.20.1 and Fabric 1.21.1 that I made for modpacks currently in development. Bygone Fortress is available under MIT License, but has not been worked on in two years.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.1, 1.20.1
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 CurseForge — 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 bygonefortress-1.0.0+1.20.1-forge.jar — drop this file into the mods folder
Download size: 137 KB
Download link checked 2 Oct 2026 — working

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

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