For most of the games offered on the ACGL platform, you will be required to add a game account to your ACGL profile in order to play a tournament for that specific game. 

In order to add or update your game account for a game, simply visit the game page and click on Add Game Account / Update Game Account at the top of the page. You can find a list of game pages here.

 

Every time you sign up and check-in to a tournament, you will also be promoted to update your game account if needed. 

*Please note that each game has a unique Game Account, meaning that for example your COD Warzone game account is independent of your COD Cold War game account, and you will need to update both if you change your Activision ID.