Global events like World Bosses and Legion Events require a live server to synchronize dozens of players in the same instance.
By hosting game logic on their servers, Blizzard can prevent common hacks, item duplication, and modding that often plague offline games with local save files.
Currently, there is .
Blizzard has explicitly stated they have no plans to support an offline mode, even for the solo campaign. Workarounds for Common Offline Needs
Global events like World Bosses and Legion Events require a live server to synchronize dozens of players in the same instance.
By hosting game logic on their servers, Blizzard can prevent common hacks, item duplication, and modding that often plague offline games with local save files.
Currently, there is .
Blizzard has explicitly stated they have no plans to support an offline mode, even for the solo campaign. Workarounds for Common Offline Needs