Recently they added the Deathless (Is that the name?) WAD, and would that one count too for the anthology ?
No, it does not count. The games you need to play and beat are as followed:
Doom (E1-E5)
Doom II: Hell on Earth
Master Levels for Doom II
No Rest for the living
TNT: Evilution
The Plutonia Experiment.
Also as a side note, any of the WADs that are not included within the list THiEF_HD209 posted are known as the "Unnofficial WADs." The ones that are on the list are called the "Official WADs."
It isn't as useful as the list but it's a thing you also need to know so then you aren't confused if there is a new WAD that releases like the most recent one for DooM II: Hell on Earth, BTSX: Episode 1.
If you have any other questions regarding Anthology or anything Unity DooM related, I'd suggest you join the discord!
Hey all you Doomers! What a joy it has been this month to have 2 add-ons added to the game! This time around we've got Sigil II made by the man himself, John Romero!
What's new on the leaderboard? 
