Here are commands needed to install PlayOnLinux together with its main dependencies:
wget -q "http://deb.playonlinux.com/public.gpg" -O- | sudo apt-key add - sudo wget http://deb.playonlinux.com/playonlinux_bionic.list -O /etc/apt/sources.list.d/playonlinux.list sudo apt-get update sudo apt-get install playonlinux sudo apt-get install multiarch-support sudo apt install --install-recommends wine-installer sudo apt-get install xterm
NOTE 1: Thanks to first 2 lines we’re getting latest stable version of PlayOnLinux (which was 4.3.4 at the time of writing) instead of some older version available in the repository (some 4.2 at the time of writing).
NOTE 2: the 2nd step is specifically adjusted for Linux Mint 19.3. Please read “Ubuntu” section on PlayOnLinux Downloads page to find correct command version for your version of Linux Mint or Ubuntu.
After these steps I was able to start PlayOnLinux and use it to install “Enter the Matrix” game (it was officially made for Windows only) from original installation DVD that I’ve bought many years ago and I was able to play this game under Linux! 🙂