Open your terminal
Update your package list
Install Steam using your distribution’s package manager
On Ubuntu/Debian: `sudo apt update && sudo apt install steam`
On Fedora: enable RPM Fusion, then install Steam with `sudo dnf install steam`
On Arch Linux: `sudo pacman -S steam`
On openSUSE: enable the Packman or non-OSS repository if needed, then install Steam with your package manager
On Flatpak-supported systems: install Flatpak if needed, then run `flatpak install flathub com.valvesoftware.Steam`
Launch Steam from your application menu or by running `steam`
Sign in to your Steam account
Let Steam finish any first-time updates
Install your games from the Steam library