This a quick summary for getting Steam Old Big Picture to work on linux and some tips to address a bug if you start the Big Picture mode or game overlay.
- I advise to uninstall any official steam package from your system.
- Read carefully the Steam Client Downgrades & Survival Kit and proceed with the Linux sections.
- Once you followed the installation procedure and the steam bootstrap process is done you should have steam installed at
$HOME/.local/share/Steam - To launch steam without a system package use the launcher at
$HOME/.local/share/Steam/steam.sh
