yEd and GraphML is very versatile indeed. Years ago I worked on a quite big mobile game project, we used graphML to be the main quest / level / story format of

yEd and GraphML is very versatile indeed. Years ago I worked on a quite big mobile game project, we used graphML to be the main quest / level / story format of the game and naturally yEd was the editor of choice. Pretty scrappy but it worked, somehow.