Last week, just in time for the announcement (and release) of a new expansion for Cities: Skylines, I posted a video analysis on YouTube discussing what I perceive as weaknesses in the modular design philosophy behind Skylines' myriad expansion packs. The full video is available on YouTube (and embedded below), but I've also transcribed the text in blog form for those who may prefer reading over watching/listening.

I want to start out by saying that I love Cities: Skylines. Skylines is -- without a doubt in my mind -- the single best city-builder since SimCity 4, which released in 2003 (over 15 years ago, as of the time of this recording). When I watched the first trailer for the game, in which the player apparently custom-builds freeway ramps and interchanges from scratch (at about 40 seconds into the trailer), I was sold on this game! After years of having to use boring, pre-fabricated stock on-ramps and interchanges, the little civil engineer withing me practically jizzed in his pants at the idea of being able to build my own highway ramps and interchanges! And there was no looking back.

Cities: Skylines gloriously succeeds where games like SimCity (2013) and Cities XL miserably failed. It picks up the mantle of the great SimCity games of yester-decade, and brings it into the 21st century with deep simulation based on agents, a sleek and modern UI, extensive customizability and moddability, and an attractive 3-D graphics engine. It's made all the more impressive by the fact that the game's developer, Colossal Order, is a small, independent studio that had something like nine people working for it when the game initially launched. And a company with all the manpower and resources of Electronic Arts only managed to produce a flop like SimCity 2013.

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Wow, Colossal Order is really popping out these Cities: Skylines expansions in rapid succession! I feel like this is the third or fourth expansion in the last year alone! ... Hold on, let me check ...

	Expansion title	Original release
	After Dark	24 September 2015
	Snowfall	18 February 2016
	Match Day*	9 June 2016
	Natural Disasters	29 November 2016
	Mass Transit	18 May 2017
	Concerts*	17 August 2017
	Green Cities	19 October 2017
	Parklife	24 May 2018
	Industries	23 October 2018
* denotes a mini content pack, rather than full expansion.

... So, yeah; third full expansion in the last 12 months (give or take a few days). Fourth expansion in the last 14 months if you want to count the Concerts content pack. Colossal Order seems to have been following a pattern of two full expansions and a mini content pack each year since the game released. I guess that's one way to keep your game relevant. It has certainly kept me coming back every few months.

Never as robust as I would like

The problem is that the limited development time means that the content that is provided in these expansions rarely ever feels as robust or comprehensive as it should -- at least, not to me. As such, I feel like I'm getting diminishing returns from each new expansion. The amount of content that is already in the game means that each new expansion feels like relatively smaller drop of content into an already-large bucket. Each expansion feels like it gives us less to do, and has that much of a smaller impact on the overall gameplay experience.

Adding to the problem of diminishing returns: every single expansion has had some glaring omission or weakness that bothered me, and none of the later expansions have bothered to go back in and address the weaknesses and limitations of the previous expansion(s). After Dark failed to include zoneable public beaches and didn't really make the day/night cycle feel as meaningful as it should. Snowfall failed to include season cycles to go along with After Dark's day/night cycle, and completely dropped the ball with regard to mechanics like ski resorts. Natural Disasters probably felt like the most "complete" and well-rounded expansion (not to mention the most novel one), but still suffers from its content being random, and it neglected to introduce any winter-specific disasters to go along with Snowfall.

Industries follows a long-standing trend with Skylines expansions neglecting seemingly-obvious features.

Mass Transit brought the long-overdue ferry transit option, but neglected to revise cargo harbors to make cargo ship routes more practical, and didn't have any water-based city services (like a coast guard, for example) that would allow a true island economy to function without a network of bridges for freight and emergency services. Green Cities was maybe the laziest expansion, and it focused on pollution-management, but didn't bother to actually make pollution any more relevant or challenging to begin with. Lastly, Parklife granted a lot of player expression, but failed to incorporate the legacy parks into the new modular park feature and doesn't allow the camera to zoom in close enough to get a good look at your pretty decorations.

This isn't to say that all these expansions are "bad". I've liked them all (except maybe for Snowfall and Green Cities), but none of them have really wow-ed me with their content (except maybe for Natural Disasters). And the modular nature of each expansion means that it has limited-to-no impact on the core game systems, and limited-to-no interaction with the previous expansions.

The latest expansion, Industries follows suit. It promises to re-invent the way that your cities' industry functions, but kind of does it in an almost half-assed way. Much like the expansion before it, Parklife, Industries doesn't really incorporate the old legacy industry zones into the new industry mechanics. The new "Industry Area" paintbrush is virtually the same mechanic as the Park Area paintbrush from the last expansion. It isn't a replacement for the original industrial district specialization, so if feels like it's pretty much duplicating that content rather than re-inventing it.

You paint an area as an "Industrial Park", just like the parks in Parklife.

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Parklife is perhaps the single Cities: Skylines expansion that I have most looked forward to. That is because the focus of the expansion seems to be pulled almost verbatim from my own "Great Outdoors" wishlist. I'm not going to take credit for having designed this expansion for Colossal Order, because I posted that wishlist in February, and the game is releasing in May, so unless Colossal Order is supernaturally efficient at creating expansions, there simply wasn't enough time for them to design and implement Parklife after reading that wishlist. It seems like someone in Skylines design is thinking along the same wavelength as me. But who knows? Maybe somebody did see my wishlist and incorporate some elements of my ideas into the development in progress? It's certainly one heck of a coincidence!

Much of Parklife's content seems inspired by mods.

In any case, it should seem pretty obvious that I'm pleased to see this expansion incorporate so many of my own ideas and suggestions. While Parklife still isn't going to offer the same degree of freedom and creativity that you can get from mods, having these more free-form park-creation and decorative tools should be a welcome addition for anybody who enjoys adding a little more personal flavor to their city. And honestly, is there anyone playing a city-builder who doesn't enjoy making their city look pretty?

A walk in the park

One of the strengths of Cities: Skylines has always been the way that the game utilizes its space and the natural environment. The mechanical limitations of the terraforming tools means that you rarely (if ever) have the money and terrain available to make wholesale changes to the geography of the map. Even if you have a billion dollars saved up in your city's coffers, the fact that every cubic meter of dirt that you excavate has to go somewhere, and every cubic meter of dirt that you dump has to come from somewhere, means that you can only do so much to modify the map. Starting out with a limited budget, small pool of unlocked buildings, and a relatively small plot of land means that young cities often have to work around environmental and natural obstacles, which made those obstacles part of the character of your city. Well now you can actually formally use those obstacles.

I now have a more meaningful choice of how to utilize this resource-rich mountain.

Parklife allows you to leverage these features of your landscape as part of your city-beautification plans. That mountain that is too big to level, and too steep to realistically build on, can now be turned into a massive park, complete with hiking trails, lookout points, and so forth. If that mountain also happens to have ore or oil resources under it, then now I suddenly have some meaningful choices to make on how to effectively utilize the resources. What used to be a near-obvious matter of "build some mines" actually has some viable alternatives.

Sure, you were always able to place walking paths in places like that, but the game (and the citizens of your city) never really recognized it as a place they can go for leisure and entertainment. If they didn't have to go to work on the other side of that mountain, they simply wouldn't walk those trails. No matter how beautiful you would make it, that mountain-side hiking trail was always little more than useless dead space.

Areas that used to be dead space that was impractical for construction can now be utilized.

That's no longer the case. Every last square meter of your city can now be turned into useful park space if you feel so inclined...