I still remember reading about and later buying the very first Civilization in the early 90s - on floppy disks. I followed the sequels via reviews and Youtube but never bought another one. Until now.
The app isn‘t cheap. With around 60 Dollars/Euros/Franks it‘s about the same as you pay on Steam for the PC version. But there is a launch sale right now and you can get it for half the price. Plus: You don‘t have to buy the game right away. You can play the first 60 turns for free.