I also had the low fps issue.
The fix is to grab the SR patch from the pc gaming wiki Septerra Core: Legacy of the Creator page.
Scroll down to "Essential improvements" and click the "SR" link under "Other Patches", which will take you to the github release. expand the "Assets" menu under the patch notes and grab your corresponding file. If you're on Windows, you need to unpack the zip and drop the files into the game's root directory. Right click the zip file > Extract all> Extract > Copy everything inside (Ctrl A, then Ctrl C) Ctrl V inside the root directory, or, On GOG GALAXY, just navigate to your library, click on Septerra Core, click the settings tab next to the play button, click manage installation, click show folder- past the files from the zip folder there. If you're on Linux, you probably already know what to do. Open the Septerra.cfg with something like notepad++, tweak the settings to your heart's desire. The file explains every option. Save. Launch the game from SR-Septerra.exe, or, go back to the GOG GALAXY game page in your library > settings button > Manage installation > Configure > Features > Scroll down > Add another executable > Click the top box > Select another executable > Navigate to SR-Septerra.exe and select it > Check Default executable > Click OK >Click Play> Play the game
Post edited November 30, 2025 by Zaleskar