

I’m surprised that the effect of major rivers is big enough to be visible on a global map, at least in otherwise saline areas (Amazon, Mississippi, Congo?). Interestingly, the world’s longest river (Nile) which drains into one of the saltiest seas (Mediterranean) doesn’t register on this scale at all.
The first game in the Kingdom series, “Kingdom: Classic”, is free on Steam (Linux, Mac, Windows), so if you’re undecided about the bundle you can try that one out first. I just finished it and can certainly recommend it; it has a very engaging gameplay, beautiful pixel art and simple, intuitive game mechanics.