As time progresses in the game, you will move into different eras, like Ancient, Classical, Modern, etc. The expansion introduces a new bonus system, which... Read All The latest expansion for Civ6, Rise and Fall, has been released. The expansion adds 9 civs and new game mechanics. One of the new features is the ability to use governors. They come with their own unique promotions that provide helpful abilities. They can be established in your own cities, or in a city-state. One of my personal favorite governors is the cardinal, who ultimately can give apostles an extra promotion. There are others focused on other aspects of the game like military, growth, etc.
As time progresses in the game, you will move into different eras, like Ancient, Classical, Modern, etc. The expansion introduces a new bonus system, which calculates an “era score.” You gain points by doing different things, like being the first to fully establish a religion. There are Dark, Normal, Golden, and Heroic ages. Dark ages aren’t necessarily bad and being in one actually makes it easier to enter a Golden age. For a more of a detailed look check out
There are a few more new things I haven’t fully explored yet. I know that you can actually lose a city if it’s loyalty drops, it can gain its independence. Loyalty is something I haven’t really observed, perhaps it becomes more of an issue at a higher difficulty. There are also world emergencies, in which multiple civs can team up against another. I’ve seen this in my game as I convert other civs to my religion. I had to defend my religion, which I was able to do and was granted a nice bonus.
If you want to know more about Rise and Fall, I suggest looking at the wiki or checking out one of the many videos the developers have released on YouTube. Be sure to check out the one I embedded to see a bit of what's new.