Classic Achievement

Make the Advancement UI more old school.

1.9K Downloads

fabricforgedecorationutility

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About this Mod

Bring back the old-school achievement UI. Based on the 1.11.2 source code. I have restored the features of the old version as much as possible.

However, advancement is quite different from achievements, so I made some adjustments (mainly regarding the logic for spreading achievement nodes).

It comes with the achievements 'Taking Inventory,' 'Getting Wood,' and 'Benchmaking,' and changes the 'Advancement' text to 'Achievement'

It has a config. Allows you to choose either the early achievement UI style or the late achievement UI style.

You can use it freely in the modpack.

Available Versions

Classic Achievement 1.0-1.21.1-Fabricrelease

MC 1.21.1fabric

January 2, 2026

Classic Achievement 1.0.3release

MC 1.20.1forge

December 31, 2025

How to Install Classic Achievement on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "Classic Achievement". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforge

Minecraft Versions

1.21.1, 1.20.1

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Classic Achievement server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Classic Achievement compatible with fabric and forge?

Classic Achievement officially supports fabric, forge for Minecraft 1.21.1, 1.20.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Classic Achievement – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Classic Achievement consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.