Install OneClient in Prism Launcher

Use the OneClient mods for Minecraft 1.8.9 in Prism Launcher or MultiMC. The instance has Ornithe and every mod in it already, and it needs Java 25. Import it again when you want newer mods.

Download instance

Back to OneClient

Prism Launcher

Prism Launcher imports from a link, so you can skip the download.

  1. Click "Add Instance"
  2. Open the "Import" tab
  3. Paste the link and click "OK"

The link to paste:

https://data-v2.polyfrost.org/oneclient/bundles/generated/oneclient-1.8.9-ornithe-multimc.zip

MultiMC

Works in MultiMC and the launchers based on it.

  1. Download the instance
  2. Click "Add Instance"
  3. Pick "Import from zip" and choose the file

Download .zip

Want another Minecraft version? (1.21.1+)

You can just use the .mrpack for those. The OneClient modpack is on Modrinth, and Prism Launcher can import it.

Get it on Modrinth