Steps to follow to solve CRC Mismatch error in Age Of Empires 3 MultiPlayer

1. Open Game Using Age of Empires III.exe

2. Use same keys to install Age of empires III on Both Systems.

3. Click on "Help and Tools" and click on "Check Updates" in both systems. Make sure you are connected to internet.

4. After installing updates open game>click on multiplayer>Lan.

5. If System A is hosting the game, System B should join and vice-versa.


  1. What happens is this, I'm with the age 3 and all expansions installed on my laptop, however when I connect the internet to play with my friends on lan, error crc mismatch appears, however we are all on the same version. What should we do?

    Help us please, we've tried reinstalling the game but nothing worked.
    thank you

    If possible please forward the response to my email with theme Response Age3 resolution crc mismatch.


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