Yes, you can either add the game as a non-steam game and force proton, or use Lutris or Bottles (with proton or other WINE runner). For repacks with installers, you can launch the setup.exe with Lutris or Bottles (install the game to ‘fake’ drive_c and move it), just make sure you include dependencies that require it (usually .net framework).

Source: rutracker&org oder jeder andere legale tracker (ohne Gewähr, keine Haftung für die Richtigkeit dieser Information, strictly for educational purposes, ask your parents before doing anything, also ask them if they’d like to pay 5€/month for a VPN when you live in germany. thank you)