After disappearing for a short while, Xbox One users can access the older versions again.
Confirmed to be coming to the game last year, private servers are almost here.
Players can "learn a lot" about the Slayer "if you look for it" as per id Software's Marty Stratton.
Id Software will also host a panel celebrating 25 years of Doom.
Eternal leads the pack of Bethesda content at this year's Quakecon
The legendary franchise is the focus at this year’s QuakeCon.