With AURO, it always helped me a lot to visually draw out some of the feedback loops, counters and other systems of the game. Very early in the process, I did some of this, but a lot of the old charts I had were on paper and are now obsolete anyway. So here's the first draft of some new ones. I haven't gotten into the kinds of buildings, or the kinds of units yet. Both of them could have direct relationships with certain things. Like, maybe if there aren't a lot of mountains, there's some relationship between that and a certain kind of building for example. This is just the basics, for now. What do you think? Feel free to add your own modifications / additions etc. EDIT: BTW, this also is with the new concept in mind - that buying units can be done at any time. Also I haven't included exploration yet, which would now be actually reliant on food AND materials, if it's something you can do when you level up your city.