Modding

As far as I remember, all artifacts are linked to a specific ID; you need to modify the existing ones, for example, the "Frida" artifact, and all special abilities are likely in the executable file.

I've never delved into the executable file before. How complex is it? What program do I use to open it?

Added 4 minutes later
Are there any maps where changes have been made to the executable file, so I can see what's what?