This was done as a throwback to Shareware, an old game trial service from the 1990’s that the original Doom was famous for using.
Bethesda also revealed various updates for SnapMap, and UNTO THE EVIL, the first multiplayer DLC for DOOM. UNTO THE EVIL will include 3 new multiplayer maps, a new playable demon named The Harvester, a new gun, and additional armor sets and taunts.
They also announced that DOOM will be playable in VR with the HTC Vive.
The demo will only be available for a limited time. DOOM is available now for PS4, PC, and Xbox One.