Note: This is a community package of Steam gaming platform not officially supported by Valve.

Steam is a software distribution service with an online store, automated installation, automatic updates, achievements, SteamCloud synchronized savegame and screenshot functionality, and many social features.

Note: To add a game library on another drive, first you need to grant the app access to it:

flatpak override --user --filesystem=/path/to/your/Steam/Library com.valvesoftware.Steam