: These projects operate in a legal gray area or in direct violation of Blizzard's Terms of Service.
Early analysis by teams like the one behind the Project: Ascension (a hypothetical placeholder name for this post) revealed that the game client communicates with Battle.net services via RESTful endpoints for authentication, while the game traffic itself uses Protocol Buffers (Protobuf). diablo 4 server emulator work
to avoid server lag or queues, Blizzard has stayed firm on the requirement for an active internet connection. As of April 2026, the game is currently in Season 12 (Season of Slaughter) : These projects operate in a legal gray