Sanctuary is open. Players from all corners of the internet roam its gothic world. Dungeons are ransacked by parties of roving adventurers, and quiet hamlets are turned into hubs for multiplayer meet-ups. The hardiest choose to go it alone. But others form guilds to cleave through legions of hellspawn.
I'm not describing Diablo 4, but rather the original vision behind its predecessor, as conceived by Blizzard North over 20 years ago, before most of the team left, the studio shut down, and Diablo 3 was all but rebooted from scratch.
