EditorApplication.ExecuteMenuItem

Вызов пункта меню в указанном пути.

Эта функция также работает со Скриптами Редактора.

// Simple script that lets you create a new
// Scene, create a cube and an empty game object in the Scene
// Save the Scene and close the editor

using UnityEditor;
using UnityEditor.SceneManagement;

public class ExampleClass
{
    [MenuItem("Examples/Execute menu items")]
    static void EditorPlaying()
    {
        var newScene = EditorSceneManager.NewScene(NewSceneSetup.EmptyScene, NewSceneMode.Single);

        EditorApplication.ExecuteMenuItem("GameObject/3D Object/Cube");
        EditorApplication.ExecuteMenuItem("GameObject/Create Empty");

        EditorSceneManager.SaveScene(newScene, "Assets/MyNewScene.unity");
        EditorApplication.Exit(0);
    }
}