Yes. Satisfactory supports ordinary player-hosted online sessions, so one player can load a save and friends can join without installing or renting a dedicated server. The host starts the world as an online session, selects a privacy mode, then invites players or shares the session ID. A dedicated server is only necessary when the factory must remain available while that host is offline.
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What “without a dedicated server” means in Satisfactory
A non-dedicated game is a normal Satisfactory save running as an online multiplayer session from one player’s game. That player is the host: the game session exists on the host’s machine, and other players connect to it. You do not need a separate server installation for a normal co-op group.
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This model is best for groups that usually play at the same time. It uses the game you already own and the in-game session controls. It does not create an independently running world. The host’s availability therefore determines when the group can enter that save.
Satisfactory reached its full 1.0 release on September 10, 2024. The multiplayer workflow described here applies to the released game’s ordinary online sessions; it is separate from the configuration work involved in running a dedicated server.
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What you need before hosting
Before opening the factory, make sure every participant is using a supported platform combination and has the required account connection. Steam and Epic players can play together on PC. Console multiplayer requires an Epic Games account for both hosting and joining, because the console version uses Epic Online Services for multiplayer and cross-play.
Decide who will host based on schedule and network reliability, not merely who owns the largest factory. The host needs to be available whenever the group wants to play, because the save is running from that player’s game. If the usual host is away, the session is unavailable until that player starts it again.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →It is also sensible to make a backup before changing branches, moving a world between installations, or relying on cloud synchronization. On Windows, the relevant save location is %LOCALAPPDATA%FactoryGameSavedSaveGames. Copy the files to another location so the group has a recovery point if the wrong save is selected or a branch change causes a problem.
Check the platform boundaries before you start
PC: Steam and Epic can play together
Steam and Epic players on PC can join the same player-hosted session. They can connect with a session ID, or they can link an Epic account and add one another as Epic friends. This lets the friend appear in the game’s join interface even when the players bought the game from different PC storefronts.
Storefront ownership is therefore not the deciding factor for PC co-op. The players still need to be in the same active session, use a compatible privacy setting, and enter the correct ID or friend relationship. If one method does not work, try the other rather than assuming Steam and Epic are incompatible.
Consoles require an Epic account for multiplayer
On console, an Epic Games account is required to host or join multiplayer. The console version uses Epic Online Services for multiplayer and cross-play features. Each console participant should complete that account connection before troubleshooting invitations or session discovery.
Console and PC sessions are separate
The official support information keeps the console and PC ecosystems separate for this purpose. A console player cannot join a PC session, and console players cannot join dedicated servers. If one member of the group is on console and another is on PC, the normal player-hosted workflow described below will not bridge those platforms.
How to host a Satisfactory session for friends
1. Start or load the factory
- Open Satisfactory and choose a normal save, or start a new world.
- Start or load that world as an online multiplayer session. The host’s game becomes the active session that other players will join.
Use the save that contains the factory you want the group to share. There is no separate “server save” to create for this method. Loading the wrong save is easy to do when several versions have similar names, so confirm the factory and branch before distributing a session ID.
If the group is moving from solo play to co-op, make a backup first and then load the copied or intended save. Everyone will be working in that same world while the host is online; the save remains associated with the host’s normal game files.
2. Select the privacy mode
Choose the setting that matches how you want people to connect:
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- Friends Only: people on the host’s friend list can find the session from the Join Game menu without a direct invitation. This mode also permits joining with a session ID.
- Private: players can join only through in-game invitations. A session ID will not find a Private session.
If you intend to send an ID to several people, select Friends Only rather than Private. If you want complete control over each entrant, use Private and invite players individually. Privacy is a connection rule, so changing it can explain why an otherwise correct ID appears not to work.
3. Copy the session ID
- Enter the world.
- Press Esc.
- Open Manage Session.
- Choose Session Settings.
- Copy the displayed Session ID.
Send that ID to the players who should join. The ID is the connection method for the specific active session, so copy it after the host has loaded the intended save and selected the desired privacy mode. If you restart, load another world, or change the session arrangement, have the host check and share the current ID again instead of reusing an old message.
Share the ID privately with the intended group. The ID is convenient for cross-storefront PC play, but it should still be treated as access information for the active session.
4. Keep the session running
Leave the world running while friends are playing. Because this is player-hosted, the active session is available only while the host is running it. Closing the game, leaving the session, or shutting down the host’s machine ends that availability for the group.
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How friends join the session
Joining with a session ID
- Launch Satisfactory on the same compatible platform group.
- Open the multiplayer or Join Game interface.
- Choose the option to join by session ID.
- Enter the ID exactly as the host provided it and connect.
This method is useful when Steam and Epic players need to connect across storefronts on PC, or when the host does not want to manage a larger in-game friends list. If the game reports that it cannot find the session, first ask the host to confirm that the session is still running and set to Friends Only.
Joining through the friends list
On PC, link the players’ Epic accounts and add each other as Epic friends. A host using the appropriate friends-enabled privacy setting can then be found through the Join Game menu. On Steam, the purchase storefront does not prevent cross-play with an Epic player when the accounts and session are configured correctly.
Friend-list discovery is useful for a recurring group because it avoids copying an ID every time. It does not remove the host-availability requirement: the friend’s session must still be active when another player tries to join.
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An in-game invitation is the required route for a Private session. If a player cannot find a Private session by ID, that behavior is expected: switch to Friends Only for ID-based joining or have the host send an invitation.
Player-hosted multiplayer versus a dedicated server
The choice is mainly about availability and administration, not whether ordinary co-op is possible.
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| Aspect | Player-hosted session | Dedicated server |
|---|---|---|
| Availability | The host must be running the session. | The world can remain available independently of the original player. |
| Setup | Load a save online, choose privacy, then invite players or share a session ID. | Requires separate server setup and administration. |
| Networking | Uses the game’s session and privacy controls; most players do not need manual port work. | May require explicit firewall, NAT, and port configuration. |
| PC platform scope | Steam and Epic players can connect with session IDs or linked Epic accounts. | Platform access follows dedicated-server support; consoles cannot join dedicated servers. |
| Cost | No separate server service is required for this co-op method. | A hosted service may add a cost, depending on the arrangement. |
A dedicated server becomes worthwhile when different players need to enter the same factory at different times, without coordinating around one host. It is a separate persistent hosting model rather than a requirement for normal co-op.
Player hosting is usually the simplest and least expensive choice because the group uses the existing game and does not rent another service. A dedicated-server provider can introduce a recurring charge, while self-hosting introduces installation, firewall, NAT, port, update, and backup responsibilities. No particular provider or price is universal, so compare those costs only after deciding that host-independent availability is important.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsBack up the save before changing branches or moving worlds
Satisfactory saves are stored on Windows at %LOCALAPPDATA%FactoryGameSavedSaveGames. Copy the relevant files to another location before experimenting with game branches, transferring a world, or relying on cloud synchronization.
The official support guidance specifically recommends regular backups, especially when cloud saves are enabled. Coffee Stain’s developer updates give the same directory and advise backing up before trying Experimental builds. A manual copy gives you a recovery point if a branch change or transfer leaves the wrong save selected.
Keep at least one untouched copy outside the active save directory. Label copies with the date and branch so the host can identify the intended version before starting a multiplayer session. Cloud synchronization is useful, but it should not be the only recovery plan when several people are building in one world.
Troubleshoot a friend who cannot join
Confirm the session and privacy mode first
- Make sure the host has actually loaded the intended world as an online multiplayer session.
- Check whether the session is Friends Only or Private.
- For an ID connection, use Friends Only. A Private session will not be discoverable through its session ID.
- Have the host copy the ID again from Esc → Manage Session → Session Settings after the world is loaded.
These checks eliminate the most common configuration mistakes before anyone changes firewall rules. A correct ID cannot locate a session that has ended, is private, or belongs to a different save than the host intended.
Test a different host
Change who hosts the session and try again. If the same players connect successfully when another person hosts, the result points toward the original host’s network, firewall, or account path rather than the save itself.
Use a small fresh test rather than immediately moving the entire factory. This keeps the troubleshooting question clear: whether the connection works at all, not whether a particular large world has a separate issue.
Set Network Quality to Ultra
Set everyone’s Network Quality to Ultra, restart the game, and retry the connection. Apply the setting to every participant rather than changing it only on the host, because the test is intended to remove a quality-setting mismatch from the connection attempt.
Try a fresh save
Create or load a fresh save and test multiplayer there. A successful connection on a fresh world helps separate a world-specific problem from a general multiplayer or network problem. Keep the original factory backed up while testing.
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Check the operating-system firewall
Allow Satisfactory through the operating system firewall and any security software that filters network traffic. A game can appear correctly configured while the firewall silently blocks the incoming or outgoing connection needed for the session.
Check both the host and the joining player’s security software. After changing an allow rule, restart the game and repeat the connection attempt so the new rule is actually used.
Review NAT and the documented ports only when necessary
Most players do not need to configure ports manually. If NAT behavior or a firewall is blocking the session, the official FAQ lists these ports for Satisfactory multiplayer:
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- TCP: 5222 and 6666
- UDP: 5222, 6666, and 7777–7827
Check the firewall and NAT path consistently on the relevant network equipment, then restart the game and test again. Avoid changing ports as a first step when the session works normally without them. Manual forwarding is a troubleshooting measure, not a purchase requirement; the documented problem is network reachability, not a need for special gaming hardware.
Rule out a platform mismatch
Confirm that all players are in the supported platform group. Steam and Epic players can cross-play on PC, but a console player cannot join a PC session. Console multiplayer also requires an Epic Games account for the host and each joining player.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When a dedicated server is the better choice
Choose player hosting when schedules overlap
Use the ordinary session workflow when one player can reliably open the save for the group. It has the lowest setup effort: no separate installation, server rental, or dedicated networking administration is needed. The host controls privacy from inside the game and can distribute a session ID when Friends Only is selected.
This is also the sensible starting point for a new group. You can learn the game together, verify that everyone can connect, and decide later whether asynchronous access justifies a different hosting model. There is no dedicated-server requirement hidden in the normal co-op workflow.
Choose a dedicated server for an always-available factory
Use a dedicated server when the factory must be available while the original host is away, or when players routinely work on different schedules. That convenience comes with server installation, firewall rules, NAT handling, and ongoing administration.
A dedicated server also changes the networking responsibility. Instead of relying mainly on the in-game session controls, the administrator must keep the server reachable, maintain consistent port mappings, and protect and back up the world. Evaluate those tasks alongside any hosting fee rather than treating the server as a simple button that makes the ordinary session persistent.
Coffee Stain’s March 11, 2025 developer update describes a default starting port of 8888 TCP for the updated reliable-messaging system and says the configuration can use up to 512 ports. If NAT or firewall port remapping is involved, the mappings must be configured consistently. Those settings apply to the dedicated-server model; they are not prerequisites for ordinary player-hosted co-op.
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A quick decision checklist
- Use a player-hosted session if one person will be online whenever the group wants to play.
- Use Friends Only for Join Game discovery or session-ID joining.
- Use Private when every entrant should receive an invitation.
- Link Epic accounts when PC players on Steam and Epic need a friend-list route.
- Verify console players have Epic accounts, and do not mix console and PC sessions.
- Back up
%LOCALAPPDATA%FactoryGameSavedSaveGamesbefore branch changes or transfers. - Move to a dedicated server only when host-independent availability justifies the extra setup.
Frequently Asked Questions
Can I play Satisfactory with friends without a dedicated server?
Yes. Load a normal save as an online multiplayer session, choose Friends Only or Private, then invite friends or share the session ID. The host’s game must remain running.
Does the host have to be online?
Yes for a player-hosted session. Friends can join while the host is running the world; closing the game or leaving the session ends its availability. A dedicated server is the option for access while the original host is offline.
How do I join Satisfactory by session ID?
Ask the host to press Esc, open Manage Session, choose Session Settings, and copy the ID. In the Join Game interface, choose the session-ID option and enter it. The host’s privacy mode must be Friends Only; Private sessions require invitations.
Can Steam and Epic players play Satisfactory together?
Yes, on PC. They can use a session ID or link Epic accounts and add each other as Epic friends. Console and PC ecosystems are separate.
Why can’t my friend find my session?
Confirm that the world is loaded as an online session, the host is still running it, and the privacy mode matches the connection method. Friends Only supports discovery and session IDs; Private supports invitations only. Also check platform compatibility, Epic account requirements on console, firewall rules, and NAT.
Do console players need an Epic Games account?
Yes. An Epic Games account is required to host or join console multiplayer because the console version uses Epic Online Services.
Can a console player join my PC Satisfactory session?
No. The official support information keeps console and PC multiplayer ecosystems separate, and consoles cannot join PC sessions or dedicated servers.
What ports does Satisfactory multiplayer use?
If firewall or NAT behavior blocks a connection, the official FAQ lists TCP 5222 and 6666, plus UDP 5222, 6666, and 7777–7827. Most players do not need manual port configuration.
What should I try if multiplayer still fails?
Change the host, set every player’s Network Quality to Ultra, restart the game, test a fresh save, and allow Satisfactory through the operating-system firewall and security software. Then review NAT and the documented ports if necessary.
Where are Satisfactory saves stored?
On Windows, saves are in %LOCALAPPDATA%FactoryGameSavedSaveGames. Copy them elsewhere for backup, especially before branch changes, transfers, or Experimental builds and when cloud saves are enabled.
When is a dedicated server worth it?
Choose one when players need to enter the same factory at different times without waiting for the original host. It provides persistent availability but adds setup, administration, firewall, NAT, port, backup, and possibly hosting costs.
The Bottom Line
You can play Satisfactory co-op without a dedicated server: load the factory as an online session, select Friends Only for discovery or session-ID joining, and keep the host’s game running. Steam and Epic players can cross-play on PC, while console players need Epic accounts and cannot join PC sessions. Back up the save, troubleshoot firewall and NAT only when needed, and choose a dedicated server only when the world must stay online without its usual host.
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