-After instalation, at the first start, i get something like this message: "Microsoft Visual C++ Runtime needed" To fix it, i have intall protontricks with flathub https://flathub.org/apps/com.github.Matoking.protontricks Then, i haver install the following dll "vcrun2019" (In protontricks, many error message that said my wintricks wasn't up to date but this dosn't matter)

-Kovaak's was unable to load online scenarios. I didn't find fix to it but i bypass this issue by downloading manually from the steamworkshop using steamcmd and this website: https://steamworkshopdownloader.io/ Then paste the downloaded scenario ".sce" in the appropriate folder: Steam/steamapps/common/FPSAimTrainer/FPSAimTrainer/Saved/SaveGames/Scenarios