Indeed it creates an flatimage, a file containing a base linux install and a runner of your choice. Wine staging for instance (Emulators also). You can add programs and or games to the package. Creating a one click solution to run software/game(s) without the need of aditional configuration afterwards like with lutris.
Works on all distros
For more info have a look over here: https://github.com/ruanformigoni/gameimage
Anyone knows if vsts work in this version?
My wine is currently being helt at version 9.21 due to some bugs in newer versions.