Installing Steam - PolyCatDev/bluecat GitHub Wiki
Installation
There are two main ways to install Steam:
Flatpak
The flatpak version of Steam is good for 95% of use cases but niche stuff that needs deeper access to your system won't work. The only thing that hasn't worked for me is Steam VR. For VR on linux I recommend WiVRn that works with Flatpak Steam.
GUI
Open up the included app store and search "steam". You should find it in there.
CLI
This will download steam from it's Flathub page.
flatpak install flathub com.valvesoftware.Steam
rpm-ostree
This will install Steam on system level. So if you are having problems with Steam VR or something like that you can go with this route.
CLI
This will reboot your system after install so you can use the app.
rpm-ostree install steam && \
systemctl reboot