[SirKnightly]

Change log: (chronologically ordered)
PLACEHOLDER

Deprecations:
PLACEHOLDER

Deprecations are a mechanism in FSO where a certain feature or aspect of the engine has changed or is no longer supported. Since this would normally break existing mods, we have the mod table feature "$Target Version:" with which a mod can specify what version of FSO it was developed with. Any features listed under Deprecations will be removed or changed when the target version of a mod is at least the version released in this post.

Previous 23.2.1 Release Thread

Launchers, if you don't have one already:
All platforms: For every day use, we recommend Knossos.NET, an integrated solution for downloading and launching mods.

Hidden Text: Alternative Launchers • Show

Cross-platform: wxLauncher 0.12.x Test Build (legacy project for a unified launcher)
Important: For best compatibility with FSO 3.8 and later you should use at least wxLauncher 0.12.

Windows:  Launcher 5.5g (Mirror) (Mirror) Not compatible with Windows 8+, use wxLauncher above
OS X:  Soulstorm's OS X Launcher 3.0
Linux:  YAL or by hand or whatever you can figure out.

Windows (32/64-bit)
Compiled using GitHub Actions on Windows Server 2019 (10.0.17763), Visual Studio Enterprise 2019

64-bit: fs2_open_25_0_0-RC10-builds-x64-SSE2.zip

32-bit: fs2_open_25_0_0-RC10-builds-Win32-SSE2.zip
This one is based on the SSE2 Optimizations from the MSVC Compiler.

Hidden Text: Alternative builds • Show

64-bit AVX: fs2_open_25_0_0-RC10-builds-x64-AVX.zip
This one is based on the AVX Optimizations from the MSVC Compiler (fastest build if your CPU supports AVX instructions).


32-bit AVX: fs2_open_25_0_0-RC10-builds-Win32-AVX.zip
This one is based on the AVX Optimizations from the MSVC Compiler.

What are those SSE, SSE2 and AVX builds I keep seeing everywhere?
Your answer is in this topic.
Don't want to deal with that? Use Knossos.NET and it will download the best build specifically for your PC!

Linux
Compiled with Ubuntu 20.04 LTS, GCC 9
x86_64: fs2_open_25_0_0-RC10-builds-Linux-x86_64.tar.gz
arm64: fs2_open_25_0_0-RC10-builds-Linux-arm64.tar.gz

These builds use a mechanism called AppImage which should allow these builds to run on most Linux distributions. However, we recommend that you compile your own builds which will result in less issues.
Alternatively, if there is a package in your software repository then you should use that. If you are the maintainer of such a package for a distribution then let us know and we will include that here.


macOS
macOS 10.9+
Intel (64-bit): fs2_open_25_0_0-RC10-builds-Mac-x86_64.tar.gz
Apple Silicon: fs2_open_25_0_0-RC10-builds-Mac-arm64.tar.gz

These builds are not signed and so by default will fail to launch. To run them simply right-click on the app, click open, then click open again on the security confirmation dialog. You should only have to do this once for each app.
If running the game through Knossos or Knossos.NET this step should not be necessary.

NOTE: macOS builds currently have limited support and may exhibit issues not present on other platforms.

Hidden Text: TrackIR Users • Show

Important!!
An external DLL is required for FSO to use TrackIR functions.  The following DLL is simply unpacked in to your main FreeSpace2 root dir.
TrackIR is only supported on Windows.
TrackIR SCP DLL (Mirror) (Mirror)

Known issues:

• Github issues and pending pull requests
• See the list of bugs ranked by priority

[Mr_Maniac]

Opened bug issue https://github.com/scp-fs2open/fs2open.github.com/issues/7199 - I had three crashes with RC10 - I suspect shockwaves being the culprit but am not sure.

Two crashes in FS Port+MVPs+Ship Interiors+VR when blowing up a freighter in second mission (the jumping in HOL freighters in the middle of mission)
and one crash in FS2 GOTY mission pack+MVPs+Ship Interiors+HD Main Halls+VR

Maybe I'll test tomorrow again without VR and with debug build

But no crashes with RC9

[wookieejedi]

PR is now up to fix this, thanks again for the report!

[wookieejedi]

The nightly build release today, Jan 26 2026, has this issue fixed, so we kindly ask anyone helping test to please test with that build instead. Thank you!

[Mr_Maniac]

With the current nightly the crash does not occur anymore (like expected). But I only played a few standalone missions and the second operation templar mission in tech room so far.

[wookieejedi]

Thanks for the extra testing! That is good to know, and the crash also fixed it in my reproduction cases as well.