They’re doing things a little differently this time around. With Open Beta there will be no Steam keys to redeem. Instead, they are using a new feature called Steam Playtest.
Interested players will be able to request access beginning on September 8 at 7:00AM PT (2:00PM UTC).
HOW TO ACCESS THE OPEN BETA
To request access, follow these steps:
Navigate to the New World Steam page
Scroll down a bit and you will see “Join the New World Open Beta Playtest”
Click “Request Access”
When the Open Beta begins on the 9th, you will receive an email to whichever email you have tied to your Steam account, letting you know that you can now download and play in the New World Open Beta!