files (like adding a custom "Small Trees" mod manually instead of through the mod manager), the game will flag you for tampering to prevent desyncs in ranked play. Always use the official in-game Mod Manager to ensure compatibility. Does this happen at or only when joining Multiplayer Did you recently install any third-party tools
, nothing is more frustrating than having a heated ranked match or a long campaign mission interrupted by the ominous message: "Tampering Detected: A running process may be interfering with the correct operation of AoE2 DE." age of empires 2 definitive edition tampering detected
While the message implies malicious activity, it is typically caused by benign software: Age of Empires II: Definitive Edition Tech Issues & Support files (like adding a custom "Small Trees" mod
: Right-click the game in your Steam Library > Properties > Installed Files > Verify integrity of game files . : Antivirus programs (like Avast, Bitdefender, or Kaspersky)
: Antivirus programs (like Avast, Bitdefender, or Kaspersky) and firewalls often flag game files or processes incorrectly.