Paradox Interactive has announced that the Cities: Skylines night time expansion After Dark will be released on September 24th with a price of $15 (or your country’s equivalent). Also, the developer Colossal Order has posted the first in a planned series of dev diaries which explains why there’s a lot involved with the expansion other than simply turning down the lights.

“Taking the cities from daytime to night is not as simple as one might think,” The Lead Designer Karoliina Korppoo wrote. “While the change from day to night is visually stunning, there’s much more going on under the hood. Each and every building in the game received a new texture layer to have the windows light up nicely. In addition there are new lighted signs, neon signs and other lights to make the city look interesting during the night.”

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Publisher Paradox Interactive said at Gamescom last week that Cities: Skylines will follow the same expansion strategy as its Europa Universalis game: The paid expansion will be accompanied by a “major patch with free content,” However, its contents is yet to be revealed.

Let us know what you think about this exciting expansion below!