FromSoftware Parry mod for Blade & Sorcery
Download Visual Studio Community from the official Microsoft website and Git so you can run git commands.
Open your command prompt, navigate to a suitable directory, then run git clone <link> and replace <link> with the link obtained by clicking the green Code button at the top-right of the repository webpage.
You should now have a local copy of the source code that you can view & edit using your downloaded Visual Studio Community!