The Cities: Skylines - Mass Transit DLC is unfortunately not the most essential DLC for those who are wanting to add more to their city. The additional vehicles, hubs, and depth of control are not so much a welcome addition but just a pleasant distraction. However, what this DLC has done is prompted Colossal Order and Paradox Interactive to update the user interface on the PlayStation 4, now making Cities: Skylines a must have recommendation for any simulation fan, even more so than it was before.