Hello @leillo1975, please copy your system information from steam (Steam -> Help -> System Information) and put it in a gist, then include a link to the gist in this issue report. Additionally, please add PROTON_LOG=1 %command% to the game's launch options and drag and drop the generated $HOME/steam-$APPID.log into the comment box.
PROTON_LOG=1x1 2018-08
This old game works with DOSBOX and only shows a blackscreen