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Sims 4 Multiplayer Mod

by sims4multiplayer Posted 29th Jun 2019 at 6:31 PM - Updated 10th Sep 2021 at 6:50 PM by sims4multiplayer
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This is a featured upload! It showcases the best talent and creativity available on MTS and in the community.

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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 0.12.0
- Inventory fixes for dynamic items (such as a cup of coffee etc.)
- Inventory item dragging now should work as well after traveling
- Fixed incomplete game data issue occurring when expansion pack detection set to automatic
- Added support of latest packs to expansion pack selector
- Fixed automatic detection of the game installation path
  • Changes in 0.11.1
- Fixed the inventory item dragging issues
- Fixed the dialogs appearing on the wrong client
- Added a save resync button to the launcher
- Added expansion pack auto-detection to the launcher
  • Changes in 0.10.1
- Fixed time desync bug occurred after travel
- Fixed the bug when a dialog (phone, cook, etc.) appeared on the wrong client
- Inventories now should work properly (items dragging may still have issues)
- Time is paused after traveling until all clients have loaded the new area
- Discord Rich Presence support
- Dream Home Decorator pack support
  • Changes in 0.9.1
- Freely enable/disable expansion packs in the launcher settings
- Stability fixes to avoid dark screen after traveling
- Fixed the unresponsive cursor happening on remote clients after traveling
- Launcher/mod version is now displayed in the launcher
- Read the latest mod related news right in the launcher
  • 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

Download files

Filename Size Downloads Date
S4MP Online

Size: 79.74 MB · Downloads: 15,991 · 10th Sep 2021
79.74 MB 15,991 10th Sep 2021
S4MP Online Launcher

Size: 47.86 MB · Downloads: 42,852 · 10th Sep 2021
47.86 MB 42,852 10th Sep 2021
S4MP Online

Size: 80.34 MB · Downloads: 11,528 · 22nd Feb 2021
80.34 MB 11,528 22nd Feb 2021
S4MP Online Launcher

Size: 47.34 MB · Downloads: 37,349 · 22nd Feb 2021
47.34 MB 37,349 22nd Feb 2021
S4MP Online

Size: 80.20 MB · Downloads: 11,283 · 15th Dec 2020
80.20 MB 11,283 15th Dec 2020
S4MP Online Launcher

Size: 47.27 MB · Downloads: 25,702 · 15th Dec 2020
47.27 MB 25,702 15th Dec 2020
S4MP Online

Size: 69.29 MB · Downloads: 4,756 · 10th Nov 2020
69.29 MB 4,756 10th Nov 2020
S4MP Online Launcher

Size: 43.90 MB · Downloads: 12,224 · 10th Nov 2020
43.90 MB 12,224 10th Nov 2020
S4MP Online

Size: 69.27 MB · Downloads: 3,441 · 13th Oct 2020
69.27 MB 3,441 13th Oct 2020
S4MP Online Launcher

Size: 43.89 MB · Downloads: 8,305 · 13th Oct 2020
43.89 MB 8,305 13th Oct 2020
S4MP Online

Size: 69.29 MB · Downloads: 3,372 · 2nd Sep 2020
69.29 MB 3,372 2nd Sep 2020
S4MP Online Launcher

Size: 43.88 MB · Downloads: 10,648 · 2nd Sep 2020
43.88 MB 10,648 2nd Sep 2020

Size: 22.66 MB · Downloads: 84,637 · 1st Mar 2020
22.66 MB 84,637 1st Mar 2020

Size: 23.21 MB · Downloads: 12,914 · 1st Mar 2020
23.21 MB 12,914 1st Mar 2020

Size: 25.73 MB · Downloads: 40,801 · 9th Aug 2019
25.73 MB 40,801 9th Aug 2019

Size: 25.75 MB · Downloads: 27,235 · 2nd Jul 2019
25.75 MB 27,235 2nd Jul 2019

Key: - File was updated after upload was posted
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171 Comments / Replies (Who?)

Expansion/Stuff packs required:
Sims 4

171 Comments / replies (Who?)



Type: Additional Functionality Other

Tags: #sims, #sims4, #multiplayer, #multi, #network, #online