Diablo 3 Diiis Server & Source 2025 - Akuma's Version

[akumavenom]

Source:

https://github.com/AkumaVenom/blizzless-diiis-akuma

Pre-Compiled Server:

https://github.com/AkumaVenom/blizzless-diiis-akuma/releases

Server implementation for Diablo 3 Diiis with custom features.

The currently supported version of the client: 2.7.4.84161

Act 1 is fully playable from start to end with no quest soft locking issues, All other Acts are untested at the moment.

- Implemented Custom Feature: Diablo 4 Blood Build Necromancer mechanics to Blood Siphon & Death Nova Skills.
- Implemented Custom Feature: Skeleton Mage Combat Party Bots System
- Implemented Custom Feature: Akuma’s Hell on Earth demon mode

The following changed have been made to the source so far:

Fix monster damage, targeting effectiveness, and difficulty scaling​

Fix infinite loading screen caused by invalid portal world transitions​

Fix Necromancer corpse spawning for Corpse Explosion​

Added a polished special optional D4 Season 3–style Blood Necromancer mechanics to Blood Siphon​

Added optional BloodBuild D4 Season 3–style Blood Nova mechanics to Death Nova Skill​

Adds v1.3 Party Bots an experimental server-side bot party system to the source​

add Akuma’s Hell on Earth demon mode feature with optional high-density spawns​

 

[SMUGER_11]

I don't know if I'm wrong, but it should work without internet? Because the client always throws an error message when I try without internet. I heard that it should work without internet. I'm curious about your opinion on this, or maybe any ideas on what I'm doing wrong.

 

[ExO]

Cool. Thanks for sharing!

 

[akumavenom]

I don't know if I'm wrong, but it should work without internet? Because the client always throws an error message when I try without internet. I heard that it should work without internet. I'm curious about your opinion on this, or maybe any ideas on what I'm doing wrong.

Setting up redirects client to your server:


Method - Edit Hosts File


Add redirects to the hosts file (Windows - %WinDir%\System32\drivers\etc\hosts, Linux - /etc/hosts):
127.0.0.1 us.actual.battle.net
127.0.0.1 eu.actual.battle.net

The Diablo III Client exe "Diablo III64.exe" must be started using the -launch parameter when using a shortcut of the exe to start the game.

---

What “internet” actually means for D3​

Diablo III was built as an always-online client/server game. That means:

• The client mustconnect to:
  • a Battle.net-style auth server
  • a game service endpoint
• It doesn’t careif this is:
  • real Blizzard servers
  • or your own server on LAN / localhost

So the requirement is network connectivity, not public internet.

---

Works on LAN / localhost ​

You can run everything offline from the real internet if:

• Client PC and server PC can see each other on LAN
  (or same machine via 127.0.0.1)
• DNS / hosts file points Blizzard domains to your server

Typical setup:


127.0.0.1 us.actual.battle.net
127.0.0.1 eu.actual.battle.net

In this case:

• No external internet required
• No Blizzard servers contacted
• Entirely self-contained

What happens if there is NO network at all ​

If you disconnect networking entirely (no LAN, no loopback):

• D3 client will not start
• Login/auth handshake fails
• Game never reaches character select

Blizzard never released a true offline D3 mode — it’s baked into the architecture.

 

[SMUGER_11]

Setting up redirects client to your server:


Method - Edit Hosts File


Add redirects to the hosts file (Windows - %WinDir%\System32\drivers\etc\hosts, Linux - /etc/hosts):
127.0.0.1 us.actual.battle.net
127.0.0.1 eu.actual.battle.net

The Diablo III Client exe "Diablo III64.exe" must be started using the -launch parameter when using a shortcut of the exe to start the game.

---

What “internet” actually means for D3​

Diablo III was built as an always-online client/server game. That means:

• The client mustconnect to:
  • a Battle.net-style auth server
  • a game service endpoint
• It doesn’t careif this is:
  • real Blizzard servers
  • or your own server on LAN / localhost

So the requirement is network connectivity, not public internet.

---

Works on LAN / localhost ​

You can run everything offline from the real internet if:

• Client PC and server PC can see each other on LAN
  (or same machine via 127.0.0.1)
• DNS / hosts file points Blizzard domains to your server

Typical setup:


127.0.0.1 us.actual.battle.net
127.0.0.1 eu.actual.battle.net

In this case:

• No external internet required
• No Blizzard servers contacted
• Entirely self-contained

What happens if there is NO network at all ​

If you disconnect networking entirely (no LAN, no loopback):

• D3 client will not start
• Login/auth handshake fails
• Game never reaches character select

Blizzard never released a true offline D3 mode — it’s baked into the architecture.

I did everything here, but the client throws the error even if I resize the client's window. I tried the original latest client, and that didn't throw any error at all even without internet. I know i can't connect to the server with that, because of the version difference. Does this mean there is a problem with the client, or I still messing something up? Sorry for my dumbness but I really want this to work. Thank you in advance for your help!

 

[SMUGER_11]

I think i found out what could be the problem, the client tries to fetch missing files from another address. It looks like the game client is missing some files. With the latest client, this error doesn't pop up even in offline. To test this, i clicked on the credits button in the game login window after start. On this client, the error came instantly, without internet. On the other one, nothing, successfully brought up the credits without any error. I tried to find another client with the same version, with no luck. Do you have any idea how to solve this? Btw, the server works flawlessly.

 

[akumavenom]

thanks for letting me know, i will try to look into it and see whats going on with it.

I added an experimental bot party AI system for blizzless-diiis-akuma enabled via the config.ini, enabling AI-controlled companion bots to function as a combat party alongside the player.

; ========== Bots (experimental) ==========
; Enables server-side simulated bots and optional monster respawns.
; - Enabled: master toggle for the entire bot system
; - MaxBotsPerWorld: combat bots spawned in non-town worlds when a real player enters (up to 10 recommended)
; - TownBotsPerTown: interactive "fun" NPC bots spawned in town worlds - TownBots NOT IMPLEMENTED YET.
; - MobRespawnMinSeconds / MobRespawnMaxSeconds: random respawn delay range for standard monsters

the party mage bots is available to check out on releases on github.

D3-Compiled-8.01.2026-v1​

added a new experimental fun-feature, you can check it out in the latest release.

Change-Log:

• add Akuma’s Hell on Earth demon mode feature with optional high-density spawns

Introduced “Akuma’s Hell on Earth”, an optional gameplay feature that replaces
all regular monster spawns with random demon-family enemies across Acts I–V,
paired with an optional high-density spawn mode.

Features included:

• Demon-only monster replacement for normal mobs, packs, champions, rares, and elites
• Optional high-density spawn mode that increases pack counts and mob density
• Safety caps applied to prevent server overload
• Fully compatible with Adventure and Open World modes
• Both features gated via config.ini and disabled by default

 

[SMUGER_11]

Any news about the client? (If you looked into it of course.)