It is based on the official tech tree, but is formatted for easy two-page printing and also has a lot more useful info. mikewest added unit properties, more details on how they get obsoleted and what unit(s) they supercede; building costs, wonder costs along with what tech (if any) obsoletes them; resource type and amount, first to discover bonuses, era & start occurrences, and the amount of beakers required to research each tech. The color-coding has also been refined.
Thanks to mikewest for sharing this very useful reference! This reference has been added to the CivRev Technologies page.
Origineel Artikel: http://forums.civfanatics.com/showthread.php?t=331649&goto=newpost