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Hollow Knight: Silksong Multiplayer Mods: Co-op, PvP, Installation and Setup Guide

A current guide to Silksong multiplayer mods, covering SSMP 0.3.1, Steam and LAN setup, direct IP, PvP commands, SilksongPVP and co-op with enemy synchronization.
Length7 min Posted Quest giverVGSources Team
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Hollow Knight: Silksong does not have native multiplayer in the setups covered here. Multiplayer is provided by separate community mods. For the broadest combination of Steam, LAN, direct-IP play, matchmaking, co-op features and PvP settings, use SSMP. For a Steam-only PvP experience, use SilksongPVP. For co-op with documented enemy synchronization, use Silksong Online Co-op Multiplayer.

This guide reflects the documented versions and features available on August 7, 2026.

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Which Silksong multiplayer mod should you use?

Mod Best for Important limitations
SSMP General-purpose multiplayer, Steam invites, LAN, direct IP, matchmaking, teams and configurable PvP Save files are not synchronized; skin support is incomplete
SilksongPVP Steam-only competitive play and public lobbies Synchronizes players, not items or enemies; non-Steam support is not implemented
Silksong Online Co-op Multiplayer Direct co-op with documented enemy synchronization Connection setup relies on local IP addresses or Radmin VPN; documentation is less specific about room-number joining

For most groups, SSMP is the best starting point because it supports Steam networking without port forwarding, LAN play, direct-IP connections, a matchmaking browser and both co-op and PvP-oriented settings.

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SSMP installation

The current Thunderstore release is SSMP 0.3.1, uploaded July 13, 2026. All players should install the same SSMP version.

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Option 1: Thunderstore Mod Manager

  1. Install compatible Thunderstore client software, such as Thunderstore Mod Manager.
  2. Open the Silksong game profile in the manager.
  3. Install SSMP and its required BepInExPack for Silksong.
  4. Launch Silksong through the mod manager.

Thunderstore’s Install button requires compatible manager software. If clicking it does nothing, install a manager or select Download and install the files manually.

Option 2: Manual installation

  1. Install the BepInExPack for Silksong.
  2. Extract SSMP.
  3. Place the mod DLL files directly in:
Hollow Knight SilksongBepInExpluginsSSMP

Do not leave an extra directory between SSMP and the DLL files. For example, a structure such as pluginsSSMPSSMP*.dll can prevent the mod from loading.

Start the game. A successful installation adds Start Multiplayer to the main menu.

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How to host and join with SSMP

Steam hosting: the easiest option

  1. Select Start Multiplayer > Steam.
  2. Choose the save file when SSMP prompts you.
  3. Invite friends through the Steam overlay or type /invite in the SSMP chat.
  4. Friends join through the Steam Friends list or by accepting the invitation.

Steam-hosted SSMP sessions do not require port forwarding or manual IP entry. The host and clients should still be using the same SSMP version.

Matchmaking and public lobbies

SSMP includes a public-lobby browser through its Matchmaking Service (MMS). MMS provides NAT hole-punching for direct peer-to-peer connections in most cases. Open the multiplayer menu and use its matchmaking options to browse or create a public lobby.

LAN play

For players on the same local network, use SSMP’s LAN option. LAN play does not require additional setup.

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Direct Internet play

Direct Internet hosting requires the host to forward the configured port and give clients the correct external IP address. SSMP’s current documented default port is:

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26960

If you change the port, clients must connect to the matching port. Players on different networks can also use VPN software such as Hamachi to simulate a LAN.

Do not confuse SSMP’s current port 26960 with 45565, an older SilklessCoop value. They belong to different projects and instructions.

Save files and progression

When hosting or joining, SSMP asks each player to select a save file. That save is used locally and is not synchronized with the server. Multiplayer therefore does not automatically make every player share the host’s story progress, inventory or world state. Choose the intended save before joining and back up important saves if you are experimenting with mods.

SSMP chat commands and settings

Press the default Y key to open SSMP chat. You can change the key binding in the mod’s key-bind configuration.

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Everyday commands

/help
/list
/invite
/inv
/addon <enable|disable|list> [addon(s)]
/set <setting name> [value]
/skin <skin ID>
/team <None|Moss|Hive|Grimm|Lifeblood>
/debug

Administrator and access-control commands

/announce <message>
/kick <auth key|username|ip address>
/ban <auth key|username>
/unban <auth key>
/banip <auth key|username|ip address>
/unbanip <ip address>
/whitelist on
/whitelist off
/whitelist add [name|auth key]
/whitelist remove [name|auth key]
/whitelist clear [prelist]
/auth <name|auth key>
/deauth <name|auth key>

/announce, /kick, /ban, /unban, /banip and /unbanip are administrator commands. The /copysave <from> <to> command is currently disabled.

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How to enable PvP, teams and player damage in SSMP

Enable or disable PvP

/set IsPvpEnabled true
/set IsPvpEnabled false

The shorter alias is:

/set pvp true

SSMP setting names are case-insensitive. Relevant settings and aliases include:

Full setting Alias Purpose
IsPvpEnabled pvp Player damage
TeamsEnabled teams Team rules
AlwaysShowMapIcons globalmapicons Map visibility
OnlyBroadcastMapIconWithWaywardCompass compassicon Compass-related icon visibility
DisplayNames names Player names
AllowSkins skins Skin availability

Use teams

With teams enabled, players on the same team cannot damage one another. Select a team from the client settings menu or use:

/team None
/team Moss
/team Hive
/team Grimm
/team Lifeblood

Change player damage

/set NeedleDamage 1
/set NeedleStrikeDamage 2

Aliases include needledmg. For example:

/set needledmg 1

SSMP’s skin command is /skin <skin ID>, but the repository describes the skin system as incomplete, so skin changes may not work correctly.

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Running the SSMP standalone server

SSMP provides a standalone server for Windows, Linux and macOS. The current server requires the .NET 9.0 runtime.

Start it from the server directory with:

./SSMPServer [port]

The port is optional. The documented default is 26960:

./SSMPServer
./SSMPServer 26960

The server creates or reads:

  • consolesettings.json for console defaults, including the default port
  • serversettings.json for server settings

The documented fullSynchronisation setting currently has no effect. Standalone-server console commands include:

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  • Forge your own path! The world of Hallownest is expansive and open. Choose which paths you take, which enemies you face and find your own way forward.
  • Evolve with powerful new skills and abilities! Gain spells, strength and speed. Leap to new heights on ethereal wings. Dash forward in a blazing flash. Blast foes with fiery Soul!
  • Equip Charms! Ancient relics that offer bizarre new powers and abilities. Choose your favorites and make your journey unique!
  • An enormous cast of cute and creepy characters all brought to life with traditional 2D frame-by-frame animation.
exit
log [log level(s)]

SilksongPVP: a separate Steam-only PvP mod

SilksongPVP Multiplayer Mod is not an SSMP add-on. Its current Nexus version is 1.1, last updated January 26, 2026. It supports Windows and macOS, requires Steam, and provides public lobbies for up to 20 players.

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Its current lobby labels are:

  • Invite to Lobby
  • Join Public Lobby

Players must be Steam friends to use Steam invitations. The mod also includes lobby chat.

SilksongPVP installation on Windows

  1. Install BepInEx for Silksong.
  2. Extract SilksongPVPWindows.zip and copy its folder to the Silksong game root.
  3. Alternatively, extract SilksongPVPRaw.zip and copy the DLL to:
Hollow Knight SilksongBepInExpluginsSilksongPVP.dll

SilksongPVP installation on macOS

  1. Install BepInEx for Silksong.
  2. Place the DLL at:
Hollow Knight Silksong/BepInEx/plugins/SilksongPVP.dll

After launching, the top-left of the game should show the player’s name and a leave button. If those controls do not appear, verify that BepInEx is loading and that the DLL is not inside an extra nested folder.

SilksongPVP implements nail slash types, crest support, player map icons, pogoing with Hunter’s Crest and silk skills that deal two masks. Red tools are intentionally disabled. It synchronizes players, but does not synchronize items or enemies, so it is not a full co-op world-state synchronization mod. Its optional configuration manager can control the chat key, lobby display and related settings.

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Silksong Online Co-op Multiplayer

Silksong Online Co-op Multiplayer is a separate mod, currently version 1.6 and last updated August 6, 2026. It is described as being in active development and includes enemy synchronization, direct hosting, direct joining by IP and lobby room numbers.

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Same-network setup

  1. The host selects Host Direct.
  2. Other players select Join Direct.
  3. Each client enters the host’s local IP address.

Different-network setup with Radmin VPN

  1. Install Radmin VPN on every computer.
  2. Have every player join the same Radmin VPN network.
  3. The host selects Host Direct.
  4. Clients select Join Direct and enter the host’s Radmin VPN IP address.

The mod also supports joining through a lobby room number, but the available documentation does not specify a command-line syntax or a more precise menu path for that method.

Troubleshooting

SSMP does not appear in the main menu

  • Confirm that BepInEx for Silksong is installed and loading.
  • Check that the DLL files are directly inside BepInExpluginsSSMP.
  • Remove an unintended extra nested folder.
  • If using Thunderstore, launch through the compatible mod manager.

Thunderstore’s Install button does nothing

The button requires compatible client software. Install Thunderstore Mod Manager or choose Download and follow the manual installation path.

Steam invitations fail

Use Start Multiplayer > Steam rather than a direct-IP workflow, then invite through the Steam overlay or /invite. Steam mode uses Steam networking and does not require port forwarding.

Direct IP fails

Check the host’s IP address, confirm that everyone is on the same LAN or VPN when applicable, and verify that the configured port is forwarded. SSMP’s documented default is 26960, not 45565.

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Players connect but progress differs

This is expected: SSMP uses each player’s selected local save and does not synchronize saves with the server.

PvP is not causing damage

Enable IsPvpEnabled. If TeamsEnabled is active, confirm that the players are not on the same team.

SilksongPVP lobby controls are missing

Verify that the DLL is in BepInExplugins, there is no extra nested directory, and the game is launching with BepInEx active. The expected indicator is the player name and leave button in the top-left.

Bottom line

Install SSMP 0.3.1 if you want the most flexible Silksong multiplayer setup: use Start Multiplayer > Steam for easy friend invites, LAN or direct IP for alternative connections, and SSMP’s settings for PvP and teams. Choose SilksongPVP for Steam-only competitive lobbies, or Silksong Online Co-op Multiplayer when enemy synchronization and direct co-op are the priority. These are separate community projects, so do not mix their installation paths, commands or port numbers.

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