Formatting of an RPG script Options

[heartlessmushroo...]

I've been wanting to start writing the script for an RPG project for quiet a while fbut I dont know how to begin hoestly. Since great part of the storytelling is going to be told via gameplay, events and dialogue, writing this as if it were a novel or comic book strip would be kind of odd.

So, what woudl be the closest format I could use to start writing an RPG script? Are there any formats specialized in wiritng RPG's alone?
Thanks in advance.