Run a community-built server implementation for Diablo III through the open-source DiIiS project.

github.com/blizzless/blizzless-diiis
DiIiS homepage screenshot

About DiIiS

DiIiS is an open-source, community-built local server implementation for Diablo III: Reaper of Souls. It is hosted as a GitHub repository. The project's README lists implemented systems, including account creation and login, a lobby, a chat system with friends, a clan system, an item generator with in-game affixes and set items, and main story quest scripts for all five acts. Some systems are listed as partially implemented: artificial intelligence for 80% of minions, personal AI for 40% of monsters, and for half of the bosses.

Setup requires PostgreSQL 9.5.25 (or Docker), the .NET 7 runtime, and a supported client version, 2.7.4.84161. Each connecting client needs a certificate installed and hostname redirects added to its hosts file. The README states that these redirects prevent the official Battle.net application from connecting to the server. The source also states that the donate store has been removed.

Key features

  • Account creation, authorization and lobby system
  • Chat system and friends list
  • Clan system
  • Item generator with in-game affixes and set items
  • Main scripts for all story quests across five acts
  • Basic scripts and generator for Adventure Mode
Best for: Technically experienced Diablo III players or developers who want to run a private local server for the supported client version.
Good for
  • Open source, with a Docker option for deployment
  • Lists implementation status for partially complete systems, such as AI coverage percentages
  • Story quest scripts are listed as implemented for all five acts
Watch out for
  • Supports only client version 2.7.4.84161, according to the source
  • Client setup requires editing the hosts file, which blocks the official Battle.net application from connecting
  • Requires PostgreSQL 9.5.25 and the .NET 7 runtime for manual setup

DiIiS at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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DiIiS FAQ

Which client version is supported?
The README lists the currently supported client version as 2.7.4.84161.
Can the server be run with Docker?
Yes. The README says to install Docker and run docker-compose up from the root folder of the repository.
Will the official Battle.net application still connect after setup?
No. The README states that after the hosts file modification, the official Battle.net application will not be able to connect to the server.
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