If you received your Closed Beta code, here's how to redeem it on the Epic Games App:
STEP 1: Download the Epic Games App here.
STEP 2: Open the app.
STEP 3: Left Click on your user icon on the top right of the Epic Games App.
STEP 4: Select "Redeem Code".
STEP 5: Enter the code.
STEP 6: NOW INSTALL & ENJOY THE GAME!
If you haven't registered yet...
Register to the Closed Beta at https://www.metalcore.gg.
(A few keys will be distributed every 24 hours, keep an eye on your emails & be patient. Maybe you'll be lucky enough to get one!)