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Multiplayer

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4 players in multiplayer.

Satisfactory can be played in multiplayer, with up to 4 players officially supported, but with no hard player-limit (see below).[1] The game is co-op only and there will be no PvP elements, although engineers can damage each other.[2]

Cross-platform multiplayer is available across Steam and Epic Games.

Hosting a session[edit | edit source]

Currently, sessions can only be hosted by players. The session host cannot leave the session without disconnecting other players.

In order to start a multiplayer session, the host has to start an online session (a normal session like when playing in singleplayer, as long as the host has internet access and authentication servers are working normally) and then allow other players to join, or to invite those players (see sections below).

Session privacy[edit | edit source]

The following session privacy settings are available:

  • Friends Only - Allows anyone in the host's client list to join the hosted session from the Join Game menu without invitation. This also allows Session ID to be used, regardless of friend list status.
  • Private - Clients can only join the hosted session if invited using in-game invites. Attempting to join the session via Session ID will result in it not being found.

There are no plans for a "Public" option, due to griefing concerns.[1]

Network configuration[edit | edit source]

It might be necessary to configure the network in some scenarios, notably on NAT: Strict, which disallows hosting sessions and allows joining sessions only on NAT: Open. Should both the host and client/s have NAT: Moderate or Open, joining sessions should be normally possible.

The game uses the following ports:

Additonally, ensure Windows Firewall rules weren't refused when asked for permission.

Sessions with more than 4 players[edit | edit source]

In order for more than 4 players to be able to play in one session simultaneously, the game's config has to be edited.

The host has to navigate to %localappdata%\FactoryGame\Saved\Config\WindowsNoEditor\Game.ini and add the following lines to the end of that file:

[/Script/Engine.GameSession]
MaxPlayers=X

where X corresponds to the desired maximum amount of players.

Dedicated servers[edit | edit source]

Dedicated servers are currently being worked on at higher priority[4] with no set release date.[5]

Some information about them is already known:

  • Time will not stop if there are no players on the server, therefore factories will keep on working.[6]
    • However, the server (regardless of player activity) will need to be restarted every 24 or 48 hours, which might happen automatically.
  • Linux support is wanted, but not yet confirmed, Windows is the initial platform they are being worked on for.[7]
  • The release isn't linked to a major update, it will be released alongside just a patch in the experimental branch once ready.[4][8]
  • Dedicated serves will not cost anything (meaning that the software itself will be free, but server providers will likely charge for their services).[9][10]

Joining a session[edit | edit source]

Join Game menu[edit | edit source]

Players can join online sessions of players in their friends list from the Join Game menu. As mentioned above, invitation may or may not be required based on the session privacy setting. It is easy to join players on the same platform this way, in order to crossplay, Steam players must have linked their Epic account upon prompted.

Session ID[edit | edit source]

Every online session has a set Session ID. Anyone who has access to this ID can join the session, as long as its privacy is set to Friends Only (despite the name, neither user does actually have to be in each other's friend list on either Epic or Steam).

This ID is unique to each session and is reset once the game is quit to the main menu or entirely.

The session ID can be found by doing the following:

  • Press Esc.
  • In the menu, click on 'Manage Session', then click on 'Session Settings'.
  • Here, the session ID can be edited or copied it to the clipboard.

The host of the session can then share this session ID in order for both Epic and Steam players to be able to join the session.

Other options[edit | edit source]

Performance improvements[edit | edit source]

  • Have the host and all clients choose Network Quality: Ultra in the options.
  • If experiencing high latency, try unchecking Send Gameplay Data in the options.

Temporary lag solution[edit | edit source]

There is a way to decrease rubberbanding at the cost of increasing bandwith by adding the following lines to the game's config files found in %localappdata%\FactoryGame\Saved\Config\WindowsNoEditor\.[11] Before adding the lines to the config files, ensure they aren't already in place but with different values, if so, replace them instead of having duplicites.

By default, the game's maximum bandwith appears to be throttled at 64 KB/s. By editing the config files, this limit is increased to about 100 MB/s.

This has to be done by all players (both the host and client/s) to have effect. The increased bandwith can be even 5 times as much as it was before, therefore a stable internet connection is required.

Engine.ini[edit | edit source]

[/Script/Engine.Player]
ConfiguredInternetSpeed=104857600
ConfiguredLanSpeed=104857600

[/Script/OnlineSubsystemUtils.IpNetDriver]
MaxClientRate=104857600
MaxInternetClientRate=104857600

[/Script/SocketSubsystemEpic.EpicNetDriver]
MaxClientRate=104857600
MaxInternetClientRate=104857600

Game.ini[edit | edit source]

[/Script/Engine.GameNetworkManager]
TotalNetBandwidth=104857600
MaxDynamicBandwidth=104857600
MinDynamicBandwidth=10485760

Scalability.ini[edit | edit source]

This file will be initially blank and has to be set as 'read only' to prevent the game from overwriting it.

[NetworkQuality@3]
TotalNetBandwidth=104857600
MaxDynamicBandwidth=104857600
MinDynamicBandwidth=10485760

History[edit | edit source]

  • Patch 0.3.5.2: Added a start-up argument that disables all multiplayer related connections (-NoMultiplayer)
  • Patch 0.3.5:
    • Introduced crossplay across Steam and Epic
    • Fixed some session connection issues
    • Multiplayer information in the Manage Session UI now has the same styling as in other multiplayer related menus
  • Patch 0.3.4.15: Extractors should continue working as usual after a client player opens their menu
  • Patch 0.3.4.13:
    • Added a warning when copying the session ID from a private session, since private session cannot be joined
    • Improved the player status shown on the in-game friends list with more information (no longer just “Exploring, Building a factory, etc.”)
  • Patch 0.3.4.11:
    • Implemented changes to multiplayer connection handling and some additional UI, still work in progress
    • Added some reminders that multiplayer has more bugs than single player in relevant menus
    • Clients should see less build effects replaying when joining a game
    • Clients now get the correct tutorial info when joining a newly started game
    • Clients can now empty single Pipelines and Fluid Buffers
    • Clients can now toggle standby correctly in production buildings and resource extractors (still needs to be fixed for generators)
  • Patch 0.3.4.8:
    • Can now change online session ID in the session settings
    • Sessions starting up will now check to make sure their ID is unique and change it if necessary
  • Patch 0.3.4.7:
    • New Epic Online Services (EOS) implementation for online session handling etc.
    • Fixed a crash that occurred when clients joined a game (related to track connection)
    • Fixed client crashing when the host builds railroad tracks
  • Patch 0.3.4.2:
    • Fixed the World->bInTick crash that could occur when a client joins a game
    • Building visuals should no longer persist for client players after dismantling
  • Patch 0.3.4.0:
    • Potentially fixed a crash that can occur when a client player builds a building
    • Train timetables should now work for client players
  • Patch 0.3.2.0: Potentially fixed a crash related to multiplayer
  • Patch 0.2.1.11: Fixed an issue where some players would get no colour assigned to them
  • Patch 0.2.1.5:
    • Added a version check on joining invites and ensured that network connections with different game versions generally fail and give an error message
    • Fixed the multiplayer crash because of which the last patch was rolled back
  • Patch 0.2.1.4: The game now crashes when joining a multiplayer session (this caused the patch to be rolled back)
  • Patch 0.1.14:
    • Spore Flowers now properly react to client players
    • Alien Carapaces dropped by the Flying Crab Hatcher are now visible for clients
    • Conveyor Pole holograms now show properly under the Conveyor Belt for clients
  • Patch 0.1.13: Fixed a crash that occurred for joining clients that disconnected while in a vehicle
  • Patch 0.1.8:
    • Fixed some Map related crashes
    • Client players can now sort the inventory in various storages
  • Patch 0.101:
    • Likely fixed the issue with Sending Game Data that blocked multiplayer
    • Likely fixed some Replication Graph crashes
  • Patch 0.1: Fixed desync issues when dismantling wires connected to poles
  • Closed Alpha Build 90961 (February 2019): Introduced[12]

References[edit | edit source]