Before changing anything, log in and verify the account matches what you ordered.
Once that's confirmed, changing the email is one of the fastest ways to secure full control, but exactly how and when varies by game and publisher. HoYoverse accounts (Genshin Impact, Honkai: Star Rail, Zenless Zone Zero) need several days of active play before changing any account details; other games can typically be secured sooner. Find your game's login and setup guide on the Help Center home for the exact steps and timing.
For games where the email genuinely cannot be changed, we provide full access to the original inbox so you can reset the password and manage it yourself.