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Stormworks: Build and RescueEventsv1.15.23 - The Multiplayer API Update!
In-game event

v1.15.23 - The Multiplayer API Update!

Stormworks: Build and Rescue · published 9 Sep 2026, 16:32 UTC · build 25122525

All eventsPlayers around this dateRead on Steam

Dear Stormworkers,

This minor update is mostly focused on fixes and quality of life improvements. One significant change is that we have re-written the multiplayer to use the latest version of the Steam P2P networking - previously the game was using the original version of Steam networking from when the game first released, over 8 years ago.

This change should improve the quality of multiplayer experience for some players - the newer Steam networking is generally considered much better than their old one.

As well as this, we have made various other fixes and improvements which will hopefully improve the game for many.

Please see the patch notes below for full details.

In case you have missed it, our new game Anymaker is set to launch in Early Access next week, on September 18th. Please check it out.

We hope you enjoy this new update!

Much love <3,

The Stormworks Developers

Your support makes these updates possible.

https://store.steampowered.com/app/4435340/Anymaker/

Patch Notes

v1.15.23

Features

Upgraded multiplayer to the current Steam networking API
Moved the Barometer component to the Sensors category

Fixes

Electrolysis now only converts water while electricity is available, and scales output with the available charge
Fixed gas mass in custom tanks not affecting physics as fluid mass should
Fixed mission editor vehicles using component mods from a modpack not saving those component mods to the mission folder
Fixed component mods loaded via mods not appearing in the "group: mod name" component filter
Fixed the microcontroller parts summary in the vehicle editor not displaying cost correctly
Fixed an occasional crash when sending a chat message in multiplayer
Fixed train brake forces blowing out to invalid values when a train sits exactly on its brake position
Fixed rendering artifacts on the intro logo
Fixed multiplayer clients reading host-only vehicle data when handling vehicle data, AI team and fire extinguish events

More from Stormworks: Build and Rescue

Other announcements

All events
Stormworks: Build and Game update15 Aug 2026V1.15.20 HOTFIXFix - fixed issues spawning very large creations due to file sizeIn-game event13 Aug 2026v1.15.19 - The Small Train Wheels Update!Dear Stormworkers, In this update we have added a new train wheel component with small wheels, useful for smaller train line vehicles. While this is a minor update with just the one new component, there are many fixes and improvements which will benefit many players. We have been looking at multiplayer and how we can improve the quality of experience there, as well as improving render quality f…In-game event24 Jun 2026v1.15.18 - The Airburst Update!Dear Stormworkers, In this minor update, we have added airburst weapons for the Search and Destroy DLC. Airburst is when ammunition is set to detonate after a timed delay, in order that it can explode at the approximate range of the target. This is useful for anti-air fire, trench warfare, etc. This has been a popular request with players and we are excited to add this feature. Program the deto…