Games Prefix Manager (Decky Plugin)

This is a Decky Loader plugin converted from my standalone python script. It allows you to manage Proton prefixes (compatdata) for Steam and Non-Steam games, including finding and deleting orphan prefixes.

Features

• List all Steam and Non-Steam game prefixes, and their sizes.
• Identify orphan prefixes (folders in compatdata that don't belong to any installed game).
• Batch delete prefixes.
• Clean up all orphans in one click.
• Option to backup prefixes before deletion (saved to ~/Documents/PrefixBackups).

Installation

Install it via https://plugins.deckbrew.xyz/

Note

This plugin manages files in ~/.local/share/Steam/steamapps/compatdata. Use with caution. Always backup if unsure.