The motto of ArcoLinux is Learn, have fun and enjoy.
This is the have fun part for sure.
We install steam via the terminal.
On what desktop you install steam does not matter.
You will need a login and password for steam and it will ask a second password so that your new setup is considered safe and then you can install all the Linux games on your computer.
Start by getting the installation scripts from arcolinux-nemesis.
Open a terminal and copy/paste this in
git clone https://github.com/erikdubois/arcolinux-nemesis
You have now all the scripts on your computer.
Navigate to the AUR folder and open a terminal in that folder and install steam
That is it.
We will update this script constantly in order to keep it working.
Later you can get the updates in with a git pull in the terminal.
HOW TO INSTALL STEAM
ArcOLINUX 19.12.15 – Nvidia