- Game Mod: Skylines features an extremely robust modding toolkit, and combining that with the game being made in the Unity engine, and modders can create just about anything.
- Production Throwback:
- One of the in-game radio stations plays music from other Paradox titles, including Europa Universalis IV and Crusader Kings II.
- Most of the game's buildings, logo, infrastructure, and other content are lifted from the Cities In Motion series, also developed by Colossal Order.
- Much of the original content in gameplay are a nod to Colossal Order's previous two games Cities In Motion and Cities in Motion 2.
- Sleeper Hit: Stemming from disappointment in SimCity (2013), Skylines became one of Paradox and Colossal Order's fastest-selling titles, selling 1 million copies in a month.
- Take That!: When the game was first announced in August 2014, one of the major features touted was the fact that it could be "[played] offline", a transparent potshot at SimCity (2013) 's always-on nature.
- What Could Have Been: Had SimCity (2013) not have had the problems that ruined its reputation, the development of Cities: Skylines might have been dead in the water. What's more, CO were already planning to make Skylines in 2012 when they heard of the news about the new SimCity. They pretty much had to abandon the project, knowing they couldn't topple the behemoth of a title. They did continue some time after seeing SimCity (2013) flunked majestically, and now here they are with one of the biggest-selling titles on Steam.
Trivia / Cities: Skylines