https://bugs.winehq.org/show_bug.cgi?id=51676
--- Comment #2 from Stefanescu A stefanescu.a@mail.com --- I'm not sure what is the "upstream (non-staging) wine". I only have 2 versions of wine installed on ubuntu 20.04
wine-stable is versions 6.0 and wine-staging that is versions 6.16(currently) from the winehq repository.
The game works with 6.0, the launcher works good enough to start the game, it loads to 100% and it works, it's playable.
With 6.16 the launcher works, the game starts but when the "load bar" gets to 100% the game crashes in staid of showing the 3d game environment.