This game is one more people should play, its a remake of the pinnacle of the Settlers series and it just ended up on GoG
Its not really an RTS, its not really a city builder where you are watching your "areas of influence" of buildings ala anno/sim city. Its actually a logistics and infrastructure* game, everything that needs to be anywhere must be delivered, anything needs to be produced or processed needs to be transported and everything that needs to be transported or delivered depends on your road network. This might sound remarkably dull, but if you try the demo you might find the mix of little men scurrying about at your whim and genuine strategy soothing.
*I'm making a new genre L&I, I will not be contained.