The second things to check is weather or not it's SADX crashing or endri's Super Sonic mod. Personally I believe it would either be DirectPlay or. I know that seems like a lot of dependencies but the reason for this is that mods are built using either or for the Visual C++ redists.

Windows Media Features (99% of people have this, but some people running N editions of Windows will not have this and will need to download the media features from the Microsoft webstie.).

DirectPlay (can be found under 'Turn Windows Features on or off -> Legacy Components -> DirectPlay).

NET Framework 4.0 (Not Installed by BetterSADX, will be in the future.) NET Framework 3.5 (BetterSADX Tries to install this during the patch install) Microsoft Visual C++ 2015 x86 (BetterSADX Tries to install this during the patch install).Microsoft Visual C++ 2013 x86 (BetterSADX Tries to Install this during the patch install).DirectX 8/9 or above (You probably have this).Well, I suppose the first things to check is that you have all the necessary dependencies.

Sadx mod loader not working