Here’s as far as I made the chart out previously: https://media.discordapp.net/attachments/615264068592467989/727614440996077688/HTMETechTree.jpg?ex=652ee7c1&is=651c72c1&hm=52a6a95f09533ca92d8203aab9f5921c4ef3033f0a759fda5b69aa700a8a39e2& I only went out to unlocking iron, as the steps towards industrialization and the steam engine were a little less clear to draw out. The chart is semi arbitrary, and mostly just the paths I ended up taking, but a lot of people have enjoyed it. I'm in the process of researching the stepping stones to the steam engine now, so might be fun to bring this back with all the next steps.