If you’re on Windows 10 or 11, right-click the .exe , go to Properties > Compatibility , and set it to Windows 7 or XP (Service Pack 3) .
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This is rare. Verify game files via Steam → Properties → Local Files → Verify Integrity. Steam should have auto-applied the code. If not, the Steam key can be used as an installation key, then request an offline unlock from support. If you’re on Windows 10 or 11, right-click the