Maybe what you are seeking is the editorbuildsettings.scenes ? I don't know if you can add new scenes to it, but It provides the information you want to have (path to the scene and if it is enabled in your building scene settings).

hope that was helpful.

regards

Edit: tried myself to add new scenes to the scenes and it works. So if you have all your gamescenes in one directory you can read all filenames from this directory and add them to the editorbuildsettings.scenes automatically.

You can do something like the following in order to modify the set of scenes in the 'Build Settings' menu via an editor script:

var original = EditorBuildSettings.scenes; var newSettings = new EditorBuildSettingsScene[original.Length + 1]; System.Array.Copy(original, newSettings, original.Length); var sceneToAdd = new EditorBuildSettingsScene("Assets/Path/To/Scene/sceneName.unity", false); newSettings[newSettings.Length - 1] = sceneToAdd; EditorBuildSettings.scenes = newSettings;

That will add a new scene to the list of scenes. You can remove scenes or modify the 'enabled' property by accessing the same EditorBuildSettings.scenes array.

While you cannot change the selected scenes displayed in the build settings window from a script, you can make custom builds using BuildPipeline.BuildPlayer, which lets you pass the scenes to build as a parameter.

private static string[] FillLevels()
{
    return (from scene in EditorBuildSettings.scenes where scene.enabled select scene.path).ToArray();
}

a hacky way I found to do it is just read the EditorBuildSettings.asset file in as a string and scan for ".unity". The scene paths are stored in there, but so is the build name so make sure the ".unity" isn't followed by "3d"