Bethesda and id Software today have released a pretty wordy FAQ that describes what lucky closed alpha participants can expect from the multiplayer test. Hop on over to the official site for the details. The alpha will be available for the PC, PS4 and Xbox One.
Basically, participants will be selected from the those redeemed DOOM Beta codes which were included with retail/digital copies of Wolfenstein: The New Order or for those who pre-ordered through May 26th, 2014.
For those not selected to participate, take a look at the alpha in action in the new footage below.
DOOM Multiplayer Closed Alpha – Gameplay Video: