As far as I know, you would have to go to github,, download the source, configure, compile and install it.Then solve any problems.
Depending on the distro and versin you are running, it may be available already compiled.
Can you provide details of the game and wine version required, plus source of the information you posted?
FWIW, I run devuan(debian without systemd) and updates to the 'stable' version were released under 'stable-backports', so if I included this in my package source list whenever I performed the apt-get update/upgrade maintenance, the new packagfe would come into play and replace the old.
In the past, i have had to wait for newer vewrsion of Playonllinux to filter through. It is part of the trade off for stability.