The "Tampering Detected" error in is a security notification triggered when a third-party application or background process interacts with the game's memory or files in a way the built-in anti-tamper system finds suspicious.
Your antivirus might be blocking the game from verifying its own files. AoE2DE_s.exe Antivirus Exceptions Ensure the Windows Firewall allows the game through. ⚠️ A Note on Multiplayer If you have intentionally modified age of empires 2 definitive edition tampering detected
"A running process may be interfering with the correct operation of AoE2 DE. This may be caused by anti-virus software, malware, game overlays, or other active processes on your PC" Steam Community The "Tampering Detected" error in is a security