Blizzard
HOW TO PARTICIPATE
To participate in the public test, you must have a Diablo II: Resurrected game license attached to a Battle.net account in good standing (i.e. one that hasn't been suspended or banned). In addition, you will also need to download and install the Blizzard Battle.net desktop app if you have not already done so.
Step 1: Restart the Battle.net desktop app.
Step 2: Navigate to the Diablo II: Resurrected tab on the left-hand menu.
Step 3: On the Diablo II: Resurrected screen, there is a drop-down menu right above the "Play" button (note that this may say "Install" if you do not have Diablo II: Resurrected currently installed). Select "PTR: Diablo II: Resurrected" from this drop-down menu before proceeding.
Step 4: Click Install to begin the installation process.
Your PTR account will be created automatically if you do not already have one. The PTR is available in all supported languages, and accounts from all regions are eligible to participate. For additional assistance with installing and launching the PTR, click here.