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SPECIFICTION
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Hollow Knight MultiWorld

github.com

WindowsSelf-hosted
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Spec score 7.5 #12 of 24 in Game Randomizer Tools

What it is

Hollow Knight MultiWorld is a free, open-source set of add-ons for Hollow Knight Randomizer 4.0. MultiWorld distributes randomized items across linked game files for cooperative play, while the separate ItemSync add-on shares randomized pickups among players in a room. Players can use local randomizer mods, keep their own randomizer settings, choose nicknames shown when their items are collected elsewhere, and coordinate through a room code. The server assigns a random identifier to each randomization, allowing multiple sessions to run at once. Players can save, reload, reconnect, and rejoin to recover MultiWorld data after a crash before their first save. Mods are available through Scarab, which installs dependencies. Documentation lists a public server and explains local hosting with MultiWorldServer.exe; WAN access requires forwarding port 38281. The project supports Windows, offers advanced customization, seed sharing, and multiworld support, and is licensed under LGPL-2.1. Detailed spoiler logs are planned.

Spec sheet

Purpose
Hollow Knight MultiWorld is a Randomizer 4 add-on that distributes items across linked game files so players can receive items found in other players’ worlds.Read 9 Oct 2026 · github.com
Security
The opened project pages do not state security or compliance certifications or controls.Read 8 Oct 2026 · github.com
License
The repository lists the project under the LGPL-2.1 license.Read 9 Oct 2026 · github.com
Concurrent games
The server assigns a random identifier to a generated randomization so multiple sessions can run concurrently on one server.Read 9 Oct 2026 · github.com
Concurrent sessions
The server uses a random identifier to start separate sessions so multiple randomizer games can run simultaneously on one server.Read 8 Oct 2026 · github.com
Game dependency
The add-ons are for Hollow Knight Randomizer 4.0.Read 8 Oct 2026 · github.com
Installation
The maker says the mods are available through Scarab and that installing a mod automatically installs its dependencies.Read 9 Oct 2026 · github.com
ItemSync
The separate ItemSync add-on shares randomized item pickups among players in a room.Read 9 Oct 2026 · github.com
Local randomizers
MultiWorld lets players use local randomizer mods and their features.Read 8 Oct 2026 · github.com
Nicknames
Players can set nicknames that appear when their items are picked up in other worlds.Read 8 Oct 2026 · github.com
Notable limitation
Detailed spoiler logs containing all players’ information are listed as a future feature.Read 9 Oct 2026 · github.com
Per-player settings
Each player can access the settings of their own randomizer.Read 8 Oct 2026 · github.com
Planned feature
Detailed spoiler logs containing all players' information are listed as a future feature.Read 8 Oct 2026 · github.com
Player identification
Players can set nicknames that appear when their items are picked up in other worlds.Read 9 Oct 2026 · github.com
Public server
The documentation lists a public server at 3.131.129.52 for connecting to a game.Read 9 Oct 2026 · github.com
Randomizer support
MultiWorld uses local randomizer mods and lets each player access their own randomizer settings.Read 9 Oct 2026 · github.com
Room coordination
Players can use room codes to coordinate before starting a game, and room names can be reused after generation.Read 9 Oct 2026 · github.com
Save recovery
MultiWorld supports saving and reloading, reconnecting without losing progress, and rejoining a session if a player crashes before their first save.Read 9 Oct 2026 · github.com
Self-hosting
A local server can be set up from the release archive, and the setup guide describes configuring its listening IP, port, and server name.Read 9 Oct 2026 · github.com
Server commands
Documented server commands list rooms and active sessions, and can send an item to a player if one is lost.Read 9 Oct 2026 · github.com
Server hosting
The project documents a public server and provides instructions to host a server locally using MultiWorldServer.exe.Read 8 Oct 2026 · github.com
Server port
The self-hosting instructions say to port forward 38281 to the machine running the server.Read 8 Oct 2026 · github.com
Server requirements
The setup instructions say to run MultiWorldServer.exe and, for WAN access, forward the listening port through the router.Read 9 Oct 2026 · github.com

Strong points and limits

Strong points

  • Distributes items across linked game files
  • Supports local randomizer mods and settings
  • Allows reconnecting after pre-save crashes
  • Runs multiple sessions on one server
  • Open source under LGPL-2.1

Limits

  • Windows is the listed platform
  • WAN hosting requires port 38281 forwarding
  • Detailed spoiler logs are only planned

Who it suits

It suits Hollow Knight Randomizer 4.0 players who want cooperative multiworld sessions, local hosting, and per-player randomizer control on Windows.

Verdict

Hollow Knight MultiWorld provides cooperative item distribution and room-based synchronization for Hollow Knight Randomizer 4.0. Its self-hosting documentation and recovery options suit groups running their own sessions, while Windows and the planned spoiler-log feature define important limits.

Where Specifiction places it

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