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v1.15.23 - The Multiplayer API Update!

Stormworks: Build and Rescue · Community Announcements · September 09, 2026

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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
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