Age of Empires IV: Anniversary Edition

While on main menu, check down left of the screen, next to a + symbol, is your tag name.
Press on your name and you will view your personal info level games played etc.
Now on the top left of the screen you will see a symbol and on the right your tag name.
Click on the pencil under the potrait with the symbol.
While in the screen with all the symbols just click on the already owned one and the achievement will unlock !