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Sims 4 Multiplayer Mod

by sims4multiplayer Posted 29th Jun 2019 at 6:31 PM - Updated 5th Mar 2021 at 7:09 PM by sims4multiplayer
153 Comments / replies (Who?) - 3 Feedback Posts, 1 Thanks Posts
This is a featured upload! It showcases the best talent and creativity available on MTS and in the community.

See the mod in action

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Installation guide

Note: With the public version you can play only over LAN and the launcher requires no login!
Having trouble with the setup? Join our Discord server for help!

Supported versions:
  • Versions 0.6.1 and later only work with The Sims 4 v1.68.154.1020 or later patches
  • Versions 0.2.1 and later only work with The Sims 4 v1.54.120.1020 or later patches
  • Version 0.2.0 only works with The Sims 4 versions BEFORE v1.54.120.1020 (08/2019) patch

With The Sims 4 Multiplayer Mod, you can play The Sims 4 real-time over the network and “live together” with other players in the same household. See what the others are doing, interact with them, and have fun together!

What does this mod do?
  • This mod allows multiple players to play together with the same save file at the same time over the local network. It's a full script mod packaged with a server application that should be run on one of the PCs participating in the game.

  • There are currently no known conflicts with other mods. (It might conflict with other full script mods though.) Important thing is to have all players the same set of mods/EPs.

How to install

It is necessary to already have a save file with all the Sims created, the house should be built, and all the necessary items should be bought beforehand since currently only Live mode is supported, build & buy mode are in experimental phase. (features might work but there is no guarantee) It is also important to have a save with time paused.

One of the PCs will act as a server and should do the following additional steps:
1. Start the launcher
2. Host a game by selecting an already created save file
3. Start The Sims 4, load the save file and enter your household
4. You should see a notification verifying your game has successfully connected to the server.

The other PC will act as remote client and should do the following additional steps:
1. Start the launcher
2. Join a game by entering the IP address of the host player (displayed in the launcher on the host machine)
3. Start The Sims 4, load the save file and enter your household
4. You should see a notification verifying your game has successfully connected to the server.

At this point you are all set up, feel free to start the time and enjoy the multiplayer The Sims 4 experience! (please note that only the server’s player can control the time)

Is this mod based on other mods? Is it safe to play with the mod?
  • While there are broken multiplayer mods out there, this one is written from scratch and it yields no security vulnerabilities. (If you don't trust it, you can still disconnect your PCs from the internet while you play on LAN.) There are some people out there who claim this mod is based on existing code or has security issues, we've asked them many times to do a developer talk about it, never received any real arguments.

  • Changes in 0.8.1
- Fixed the lagging issue between Windows and Mac clients
- Buy mode bugfixes (all clients can sell/remove objects now
- All players can control the time
- The game will automatically disconnect when exiting the game (no more freezes, no need for 'disconnect' command anymore)
- The launcher will enable third party content & script mods automatically for the game
  • Changes in 0.7.1
- Initial buy mode support (buy & move objects)
- Basement object interaction fix
- Fixed launcher error popup when disconnecting from the game
  • Changes in 0.6.1
- Fixed the issue of client players not able to interact with anything in patch 1.68
  • Changes in 0.6.0
- 12 player support
- more travel fixes (infinite load, neighbor lots, etc.)
- fixed start game button in Mac launcher
  • Changes in 0.5.4
- travel fixes (infinite load, neighbor lots, etc.)
- game is automatically paused until both players have finished loading
- automatic save sync
- chat with the other player using 'chat <your message>' in the game console (CTRL + SHIFT + C)
- no need for 'mp.c' command, the game automatically connects (use 'disconnect' command when leaving the game)
- mod file (ts4script) is now installed automatically
  • Changes in 0.3.2
- travel support
- server application for MacOSX
  • Changes in 0.2.1
- support for breaking changes introduced in v1.54.120.1020 patch (released 08/08/2019)
  • Changes in 0.2.0
- added a tool which configures Windows Firewall properly for the server application
- documentation improvements

You must have the expansion, game version or stuff packs listed below installed to use this custom content. Please see the post text for any exceptions.

Sims 4
Built with Game Version: v1.54
Key: - File was updated after upload was posted
Filename - Tip: You can click the magnifying glass to see the archive contents Size Downloads Date
S4MP Online

Size: 80.34 MB · Downloads: 10,160 · 22nd Feb 2021
80.34 MB 10,160 22nd Feb 2021
S4MP Online Launcher

Size: 47.34 MB · Downloads: 30,826 · 22nd Feb 2021
47.34 MB 30,826 22nd Feb 2021
S4MP Online

Size: 80.20 MB · Downloads: 10,757 · 15th Dec 2020
80.20 MB 10,757 15th Dec 2020
S4MP Online Launcher

Size: 47.27 MB · Downloads: 24,854 · 15th Dec 2020
47.27 MB 24,854 15th Dec 2020
S4MP Online

Size: 69.29 MB · Downloads: 4,308 · 10th Nov 2020
69.29 MB 4,308 10th Nov 2020
S4MP Online Launcher

Size: 43.90 MB · Downloads: 11,262 · 10th Nov 2020
43.90 MB 11,262 10th Nov 2020
S4MP Online

Size: 69.27 MB · Downloads: 3,056 · 13th Oct 2020
69.27 MB 3,056 13th Oct 2020
S4MP Online Launcher

Size: 43.89 MB · Downloads: 7,647 · 13th Oct 2020
43.89 MB 7,647 13th Oct 2020
S4MP Online

Size: 69.29 MB · Downloads: 2,970 · 2nd Sep 2020
69.29 MB 2,970 2nd Sep 2020
S4MP Online Launcher

Size: 43.88 MB · Downloads: 9,170 · 2nd Sep 2020
43.88 MB 9,170 2nd Sep 2020

Size: 22.66 MB · Downloads: 79,297 · 1st Mar 2020
22.66 MB 79,297 1st Mar 2020

Size: 23.21 MB · Downloads: 12,278 · 1st Mar 2020
23.21 MB 12,278 1st Mar 2020

Size: 25.73 MB · Downloads: 38,922 · 9th Aug 2019
25.73 MB 38,922 9th Aug 2019

Size: 25.75 MB · Downloads: 26,043 · 2nd Jul 2019
25.75 MB 26,043 2nd Jul 2019
Don't forget to Thank the creator after downloading! Use the Thanks button located above the screenshots above.
Basic Download and Install Instructions:
1. Download: Click the File tab to see the download link. Click the link to save the .rar or .zip file(s) to your computer.
Read the upload description for installation instructions. If nothing else is specified, do the following:
2. Extract: Use WinRAR (Windows) to extract the .package file(s) (if included, ts4script as well) from the .rar or .zip file(s).
3. Cut and paste the .package file(s) (if included, ts4script as well) into your Mods folder
  • Windows XP: Documents and Settings\(Current User Account)\My Documents\Electronic Arts\The Sims 4\Mods\
  • Windows Vista/7/8/8.1: Users\(Current User Account)\Documents\Electronic Arts\The Sims 4\Mods\

Need more information?
  • Anyone can use both .rar and .zip files easily! On Windows, use WinRAR.
  • If you don't have a Mods folder, just make one.
  • Mod still not working? Make sure you have script mods enabled
153 Comments / Replies (Who?) - 99 Feedback Posts, 44 Thanks Posts
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Page 7 of 7
#151 Old 19th Apr 2021 at 4:29 AM
Default Mod:i will not tell because they will get attacked
i will tell you there is kinda a multiplayer mod before you
Test Subject
#152 Old 26th Apr 2021 at 7:22 PM
Originally Posted by iprobusegmodbutusesims4
i will tell you there is kinda a multiplayer mod before you

Im on 1.68 still I refuse to update already got all my mods and stuff working well enough, I dont feel like redoing all of it.
I play offline on origin so it never updates, so my question is which mod are you talking about and which one would be better for me to use for my version or would I absolutely have to update to use the other mod you spoke of.
(Im downloading this one now to test it out for us, so if it doesnt work for some reason I'd appreciate it if you could link me with the other one you know of if it works)
Test Subject
#153 Old 27th Apr 2021 at 10:11 PM
what happens if the person you would like to play with does not have the same packs as you? Will it cause it to not be played?
Test Subject
#154 Old 5th May 2021 at 7:31 PM
nice mod
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