Proton handles DLL overrides, Windows registry entries, and file path redirections automatically. For many cracked games (especially scene releases like CODEX, RUNE, or EMPRESS), the crack is just a patched .exe and a steam_api64.dll . Proton treats these like any other Windows binary.

Install the repack on a Windows VM first, then copy the already installed folder to your Linux drive. That bypasses the slow setup entirely.

Valve’s Proton is a modified version of WINE bundled with Steam. It offers the best compatibility because it includes game-specific patches. Even for non-Steam games, you can leverage it.

Browse to the installed game's main .exe file (not the installer).