Looks like we're back to seeing 2 Cities: Skylines expansions being released in the same calendar year. Airports released in January, and now in September, Plazas & Promenades hit digital storefronts. I wonder if this will continue now that most businesses (and presumably Colossal Order) are back to business as usual following the COVID pandemic? Or maybe Colossal Order is migrating towards releasing even smaller, more module micro-expansions such as the recently-released Financial Districts DLC (which I'll review later)? Or will we finally see an announcement on the rumored sequel to Cities: Skylines soon?

Based on previews, I was expecting this expansion to completely change the way that I build my cities by giving me more freedom to pack structures into compact spaces and to more seamlessly integrate parks with business districts, leisure and tourism districts, or neighborhoods. I immediately started thinking of multiple ways that I could potentially use these 2 ideas to create new city layouts and concepts. Unfortunately, I set my expectations too high, and pedestrian areas ended up not being quite as game-changing as I thought and hoped they might. The big problem is that Plazas & Promenades is just another iteration of the paintable area concept that has been the focus of almost every expansion since Parklife. Paintable areas is a good mechanic for things like parks and university campuses, but it can be extremely limiting for an application as broad as neighborhoods or entire districts.

Plazas & Promenades allows the construction of more walkable neighborhoods and districts.

Roads minus the cars

First and foremost is the simple fact that the new pedestrian roads look and act more like regular roads than like pedestrian paths. They are the same size as roads, being either 2 or 4 tiles wide, and are laid out almost exactly the same. None of these pedestrian roads are 1 tile wide. And, of course, the legacy pedestrian paths have not been updated to allow buildings to be zoned along them. The end result is that these "Pedestrian Zones" don't take up any less space, and aren't any more compact than any other district. Though, the high-density, "wall-to-wall" residential buildings do have the same capacity as the normal, high-density residential skyscrapers (20-26 households), despite being a fraction of the size. So I guess it's "more compact" vertically? More people being crammed into smaller spaces? If so, it doesn't seem to have any impact on the citizen's happiness or satisfaction ratings.

Using Pedestrian roads outside of Pedestrian Areas is a liability, since zoned buildings may build on them.

Even though pedestrian roads can be placed anywhere, buildings can only be placed or zoned along them if they are in a dedicated Pedestrian Area. So if I want to create a single walkway or alleyway and zone some homes or shops along it, I have to paint the entire area as a Pedestrian Area. Well, at least, that is the case if you want the buildings to be functional. The game actually will let the player zone and place buildings along pedestrian roads outside of pedestrian areas, but doing so will result in the building flashing a "Not in Pedestrian Zone" warning, and the building won't operate.

After releasing 2 full expansions every year since the launch of Cities: Skylines, expansions seemed to dry up after 2020. Sunset Harbor released in March of 2020, and there hasn't been any full expansion since then. I'm not sure if this is the result of Colossal Order shutting down its studio temporarily during the COVID-19 pandemic, or if they have just been busy working on a sequel. I had assumed that Cities: Skylines was done, and that Sunset Harbor would be the final expansion for the game. But that is not the case, as a new expansion was finally released at the end of January 2022.

The Airports expansion is yet another expansion pack using the area-painting mechanic that was introduced in the Parklife expansion in 2018, then re-used in Industries and Campus in the subsequent years. As such, I don't know that I really have much to say about Airports. A lot of the same compliments and criticisms that were already applied to Parklife, Industries, and Campus also apply here.

Campus, ironically, did not teach Colossal Order any lessons

The modular nature of the airport buildings, taxi paths, and runways provides quite a bit of customization. There are 3 styles of airports: a retro-style, a modern style, and an "ultra-modern" style. They are functionally the same, so don't fill different roles the way that different parks, industries, or university types did in their respective expansions. The airports are massive and expensive, but they can be shaped to fit into irregular spaces in or around your city. Unfortunately, there's not nearly as much expressiveness as what we were offered by Parklife.

Airports come in different styles, and are customizable (parking lots and garage are mod assets).

Of course, Airports suffers from the same problems that have plagued the previous expansions that used the leveled-areas concept.

A lot of the modular components are simply decorative and have no function other than to increase the area's abstract "attractiveness". In the case of airports, these include the various hangars, parked planes, and so forth. Even the air traffic control tower is a purely decorative object, rather than being necessary for the airport to work!

I've also never liked how the park areas (and now the airport areas) level up by increasing the total visitors, and industries level up based on the total goods produced. This is something that is easy to achieve by simply waiting in-game months or years for the number to go up, regardless of the size or quality of the park, industry, or airport. Because of that, it can be easy for an airport to jump out ahead in total visitors, such that the area can be leveled up immediately, and at any time, by simply placing new structures that bring the attractiveness up above the required threshold.

Airports level up based on the total passengers, which can be easily increased by simply waiting.

Instead, I wish these areas would level up based on the weekly visitors (or good produced, for industries), rather than the cumulative total. This is a much better metric of the capacity of a park, industry, or airport. This is one of the things that the Campus expansion did a bit better than the others, since the universities level up based on the current number of students and the number of research projects. The amount of students is capped by the size of the school, and the research projects are semi-randomly created based on the funding levels and access to research facilities.

Airports aren't like that. Leveling them up feels much simpler and requires less effort and management from the player. Airports also cannot de-level (like universities could) if you fail to maintain its attractiveness, and since total passenger count is something that can never decrease the way that a university's student attendance can decline -- or the way that weekly passenger count could potentially decrease.

I was starting to wonder if maybe Colossal Order was done with Cities: Skylines, or they had moved on to development of a full sequel. After releasing two expansions per year since the game's launch in 2015, we've now gone almost a year between expansions. The last one was the Campus expansion last May. Now here we are with a new Sunset Harbor expansion.

The announcement for this expansion (a mere week before its release) got my hopes up in a similar fashion to the Snowfall expansion. I thought that Sunset Harbor would add a slew of features that I had been longing for in the game for a long time. Sadly, Sunset Harbor disappointed me in much the same way that Snowfall's lack of a seasonal cycle and poor implementation of ski resorts did. Sunset Harbor lacks almost all of the things that I had hoped for, and it continues a trend of Skylines expansions that add new mechanics or content without revising or enhancing existing mechanics or content to utilize the new ideas.

When I saw the title of the expansion, I thought for sure that this would be the expansion that would finally introduce public beaches! No such luck. There's no public beach area. Sunset Harbor (despite having "harbor" in its title) does not introduce modular passenger and freight harbor areas, or upgrade harbors into a leveled industry like Industries did with agriculture, forestry, ore, and oil. I still can't daisy-chain my harbors to send shipping routes up rivers or canals, despite the fact that the existing passenger ferries and the new fishing industry can. It similarly doesn't convert tourism and leisure into leveled industry or commercial areas.

As always seems to be the case with Skylines expansions, I'm torn between whether I should review the expansion from the perspective of what it actually brings to the table, or from the perspective of failing to meet my own hopes and desires for what the expansion should be.

One of the things that was missing from Industries

Sunset Harbor does, however, check off a couple items from my wishlist. At long last, it has provided a desert biome map! As someone who lives in the American Pacific Southwest, I've long been frustrated by the inability to create a city that looks more like the familiar landscape of my own back yard. Now I finally can. Sadly, it's only one map, but the asset editor that's always been included in the game will allow me to make more if I want to, without having to resort to downloading mods that might destabilize the game.

I've long hoped for a desert biome to be added to the game.

The big feature of this expansion is also a feature that I thought was missing from the Industries expansion. I complained that Industries only added new infrastructure that replaced the existing agriculture, forestry, ore, and oil industries that have always been in the game, and didn't bother to add any new industries. Parklife, by comparison, added a couple new types of parks that hadn't been in the game before, including nature preserves and an amusement park. Personally, I thought that the most obvious option for a new industry to add to Industries would have been a fishing or aquaculture industry. Well, now we have a whole expansion that has added that one idea.

The new fishing industry doesn't follow suit with the Industries expansion industry areas, or the Campus university areas. You don't paint aquaculture areas and then grow them and level them up. There's no complicated production line or logistic element. The different types of fish that you can catch also don't do anything different. There's no fancy factories that consume specific types of fish (like a pizza factory that consumes anchovies), or that combine your fish with other types of fish (like a fish stick factory), or with other industry products to create a more valuable luxury good (like combining fish and seaweed with crops to make sushi).

Aquaculture does not level up or have production lines like other industrial sectors.

Instead, there's a handful of fishing harbors that act as resource-extractors, and then there's exactly two buildings that process or consume them. Your fishing harbors can either sell their fish to a market to be sold directly to consumers, or the raw fish (regardless of type) can be shipped to a factory that processes the fish and distributes them as generic goods to send out to commercial zones. In lieu of either the market or the factory, the fish will be exported to other cities for a small amount of money.

That's it! That's everything that fishing has to offer!

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In my last post, I pitched an idea for a new Cities Skylines expansion pack based off of an idea that Colossal Order had posted on its Twitter account. Today, I want to look at a couple of older tweets from Colossal Order that were intended to gauge player interest in some other mechanics and ideas. Those ideas are car wrecks and urban decay.

These concepts aren't as easy to "game-ify" and adapt to Cities Skylines current game mechanics when compared to the season and holiday ideas I pitched in the previous post. Car wrecks and urban decay are both going to require a bit more imagination to come up with ways that they would work within the game.

Colossal Order's Twitter account has apparently been fishing for new content ideas.

Car wrecks and road construction are a disaster!

One of the ideas that Colossal Order proposed in a tweet was the idea of car wrecks being a mechanic in Cities Skylines. Currently, the vehicle and pedestrian pathfinding systems will try to avoid collisions, but it's nowhere near perfect. If you zoom in close enough to any busy intersection and watch it for a while, you'll inevitably see a vehicle phase right through pedestrians or another vehicle. This is especially prominent when vehicles make a left-hand turn.

The game doesn't actually model collisions, however, so no matter how complicated, confusing, or difficult-to-navigate you might make an intersection or highway ramp, no one will ever get hurt or killed in a car wreck. This is a good thing, because if every collision did result in a wreck that would block traffic, traffic would simply never move in the game. I doubt that Colossal Order would ever implement such a feature, since it would probably be considered "in bad taste" by many people. It would also be very difficult to implement from a technical level, as it would require considerable changes to the pathfinding A.I., which would probably weaken the flow of traffic and/or completely tank the performance of the PC. Designing intersections that minimize wrecks would also need a lot more road customization tools!

Cars and pedestrians routinely pass through each other in any busy intersection of the game.

That being said, the idea of delays on the road got me thinking of another potential idea for the game: modeling road construction as a mechanic. I don't think I've ever played a city-building video game in which you had to wait for a road to be constructed before it can be used. Real road construction can often take months or years. Large highway projects can even take decades in real life. In the meantime, the city often has to designate detour routes and close off parts of roads at a time in order to allow access to businesses and homes.

This is a mechanic that seems like it would probably be too complicated to make work reliably, and be fun to play. You wouldn't get immediate feedback on whether your new highway would work, because you'd have to wait minutes or hours of real time (which would translate to weeks or months of simulated game time) for that highway to be constructed before your citizens would start using it. That would be terribly inconvenient.

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Here we are in December, and Colossal Order has yet to announce a second expansion for Cities Skylines since releasing the Campus expansion back in May. This will be the first year since the game's release that Colossal Order will only be releasing a single expansion. They have released some mini content packs, so there has been some new Skylines content -- just not a full-blown expansion.

	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
	Campus	19 May 2019
* denotes a mini content pack, rather than full expansion.

But that doesn't mean that Colossal Order has abandoned the game. In fact, they've been very active on Twitter asking for people's opinions on what kind of new content we'd like to see. Most recently, they posted a tweet asking if we'd like to see buildings with seasonal holiday decorations (such as Christmas and Halloween). Earlier in the year, they also asked if we'd like to see mechanics for car wrecks or urban decay (among other propositions). Even though these ideas seem to have been positively received on Twitter, and lots of follow-up ideas were presented by commenters (including myself), no new expansion has been announced.

Colossal Order's Twitter account has apparently been fishing for new content ideas.

Though I wouldn't be surprised if Colossal Order announces an expansion before I'm able to finish writing and publish this blog post...

Personally, I've liked all the ideas that they've suggested, in principle. As you may know, I have some gripes with how Colossal Order has handled its expansions for Cities Skylines, so I would hope that any possible future expansion would try to resolve those lingering issues. So let's go through the ideas that Colossal Order has pitched on Twitter and see if they would be worthy of an expansion pack!

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