Weird answer: the tutorial campaign in Factorio, each step is just the right size that you know what you have to do but you have to think a little bit and then

Weird answer: the tutorial campaign in Factorio, each step is just the right size that you know what you have to do but you have to think a little bit and then the next step is slightly longer/more complex. I've not played a game properly for over a decade but thanks to the tutorial I'm over 60 hours in to Factorio and enjoying every minute.