If you like to build things (think back to lego many years ago lol), then you'll love Cities Skylines, but rather than building buildings you build a city incorporating awesome landscapes and the game builds the buildings for you wherever you decide to put them.
There is a constant challenge throughout the game where you have to keep up with the ever growing demands & needs of the residents whilst also being in control of the budget and finances of your city, making a profit and keeping your finances in the green and not in the red is key here, you need good financial management to keep your city expanding & growing whilst being able to budget cautiously to afford buying & placing all roads, buildings and amenities.
I have a console version of the game (Xbox One X), but if I had the finances would get & recommend the PC version due to be able to do a lot more modding via Steam and have more control over the game, so all in all a very highly recommended game to use up many enjoyable hours of your free time and to get your creative juices flowing too! GO BUY IT NOW!!!