Most scripting games aren't really incremental games as such, although they do exist most notably in the form of a game called BitBurner.
However, it's more along the lines of HackMud, than a scriptable RPG, so it's not got the fantasy theming that progress quest / OSRS have.
There's another game which is more of a scriptable story driven RPG, although I can't remember the name of it now. It might be "While Heart.Break()" but off the top of my head I have a feeling that's more of a computer themed story driven isometric RPG than a scriptable isometric story-driven RPG, and there's another game which is, but I honestly can't remember right now, and this is my work account so I can't dig too deeply around the steam archive.