Sims 4 Multiplayer Mod
The Sims 4.
In Multiplayer.
S4MP is a mod for The Sims 4 that allows you to play the game with up to 12 friends in real-time multiplayer!

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FAQ
S4MP is completely free to play on the public version via LAN, although, there is the early access Patreon version with online access and newer features that will eventually roll out for the public version as well.
Not at all! You will be able to use the downloaded version of S4MP with its features, but it will become restricted to LAN only until renewal.
Link your Discord in your Patreon settings and it will automatically give you the role.
Yes! Crossplay is supported by S4MP between PC, Mac, and any game launchers.
You can, but only with EA & Origin! More than one can connect to the same account at a time, this will force you to be offline but still be able to play The Sims 4.
Unfortunately, you can’t due to Sims 4 limitations, you can only play in the same household and travel together even if the other sims are left at home.
If you want to experience the pack’s content, yes! You can also toggle the packs to your liking in S4MP’s launcher settings, so that everyone has the same content loaded, to prevent issues.
You may still be using the public version, please manually download the latest early access version instead.
After manually downloading the early access launcher, log into it and access the settings tab to discover your invite codes and registration link.
We usually discontinue the Online servers for older S4MP versions, so make sure that you’re up to date by using the latest version available.
Yes! Just make sure that all players have the exact same CC & Mods installed on their computers. Do keep in mind that not all scripted mods may be compatible with S4MP, causing other players unable to interact with objects or Sims.
We recommend that the host is the only one to save, then you can all exit.
You can CTRL + Shift + C to open the console and type chat , you won’t see the message being displayed but others will!
It’s quite a random issue that we haven’t found what triggers it yet, but there are some temporary fixes! – The host could try using “Save As…” instead of the quick “Save” to prevent it from happening, and also, try to avoid traveling from home to point A and then point B, C, etc. It’s best if you return home so that the mod copes up before going somewhere else.
Unfortunately, seems like this feature doesn’t fully work with EA’s new launcher. Please follow this guide to manually toggle your packs, then run your game manually instead of the Start Game button.
This could be caused by S4MP not being fully allowed through your Firewalls, your VPNs not connecting properly, incompatible and/or missing mods on someone’s end.
Latest News
S4MP 0.75.1 – Royalty & Legacy Fixes, Support for New Kit (Public Release)
This update brings further fixes for the Royalty & Legacy expansion pack dynasty features, alongside with launcher support for the latest kit. Changelog The mod requires game version v1.121 or later in order to work. We would also like to say a huge thank you to all the Patrons who have been reporting bugs and […]
Continue reading “S4MP 0.75.1 – Royalty & Legacy Fixes, Support for New Kit (Public Release)”Hello, Build Mode! | S4MP 2026.8.0 (Early Access)
S4MP is taking its first steps into modifying the game’s native binary, starting with support for drawing walls in multiplayer! With this milestone, S4MP is proud to become the first native binary mod for The Sims 4. Alongside wall drawing, this update fixes travel disconnections caused by the new auto-save feature. The game will also […]
Continue reading “Hello, Build Mode! | S4MP 2026.8.0 (Early Access)”S4MP 0.74.1 – Royalty & Legacy Fixes (Public Release)
This update brings fixes for the Royalty & Legacy expansion pack dynasty features. Changelog The mod requires game version v1.121 or later in order to work. We would also like to say a huge thank you to all the Patrons who have been reporting bugs and giving feedback in the past few months! Download the […]
Continue reading “S4MP 0.74.1 – Royalty & Legacy Fixes (Public Release)”S4MP 2026.7.0 – Travel Rework & Launcher Updates (Early Access)
This update brings a major rework to multiplayer travel, resolving travel-related issues, including the occasional black screen bug affecting client players. It also includes improvements and fixes for the new launcher. Changelog To get early access to the latest S4MP updates, become a Patron today! Important: This version of S4MP requires game version 1.121 or […]
Continue reading “S4MP 2026.7.0 – Travel Rework & Launcher Updates (Early Access)”S4MP 2026.6.0 – Major Launcher Update (Early Access)
S4MP 2026.6.0 is a major launcher update: it features a brand-new launcher with a refreshed UI, dramatically reduced download size, improved invite code management, and several quality-of-life improvements. With this release, S4MP is transitioning to a Year.Month.Minor versioning system, starting with 2026.6.0 for the June 2026 release. Changelog To get early access to the latest […]
Continue reading “S4MP 2026.6.0 – Major Launcher Update (Early Access)”S4MP 0.73.1 – Getaway Fixes & New Kits Support (Public Release)
This update continues the Adventure Awaits support with fixes for getaway editing and cancellation. Changelog The mod requires game version v1.118 or later in order to work. We would also like to say a huge thank you to all the Patrons who have been reporting bugs and giving feedback in the past few months! Download […]
Continue reading “S4MP 0.73.1 – Getaway Fixes & New Kits Support (Public Release)”