Cities: Skylines is a modern take on the classic city simulation and was released by Paradox Entertainment in 2015. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience.
From the makers of the Cities in Motion franchise, the game boasts a fully realized transport system. It also includes the ability to mod the game to suit your play style as a fine counter balance to the layered and challenging simulation. You’re only limited by your imagination, so take control and reach for the sky!
Yes it seems that most of these games now require ether Steam or Origin and I am not keen on either but without them you rather stuck. With Steam in the workshop they have loads of mods and content you able to download so it does make the game much more configurable. You also able to make your own content so that in itself is really great.