"If you were unable to join us for our recent DOOM closed multiplayer beta, you’re in luck! From April 15 through 17, you’ll be able to jump straight into the open beta – no code necessary. Simply download the beta and let the viscera fly. Like the closed beta, you’ll have access to Team Deathmatch and Warpath on the Heatwave and Infernal maps."
https://bethesda.net/#en/events/game/doom-open-beta-and-post-launch-content/2016/04/06/101
I didn't have a great time with the Doom closed beta as it crashed on my PC each time I tried it so heres hoping they get that sorted out!
If you are interested in playing the open beta and talking about it join our event below!
http://cheerfulghost.com/jdodson/events/125/doom-open-beta-thread

I just want a single single-player map.