If you want to get in on the Doom alpha, now's your chance. Bethesda has announced that registrations, previously restricted to those with beta access earned through preordering Wolfenstein: The New Order, have now been thrown open to everyone.
By popular demand, we’re opening #DOOM alpha access beyond our #DOOM Beta group. Xbox, Steam, and PS4 registration links incoming.December 3, 2015
As with most closed tests, there's no guarantee you'll get in, but if you want to take a shot you may now do so at Doom.com. You might have trouble getting in—the site is currently chugging a bit—but once you do, hit the "Alpha" link in the upper-right corner. Select your platform, and follow the instructions from there; successful applicants will receive an email containing further information.
The next Doom alpha test is slated to begin tonight at 10 pm EST and will run through the weekend.