https://www.gamespot.com/articles/call-of-duty-black-ops-4-multiplayer-beta-codes-gi/1100-6460915/

We're giving away 500 beta codes for Call of Duty: Black Ops 4 Multiplayer. Scroll down to enter below.

This is not an instant win. Winners will be selected at random and receive an email with the code. Entry is open worldwide. Codes are for the Call of Duty: Black Ops 4 Multiplayer Beta only and do not give access to the full game when it launches officially.