Is there a tech tree anywhere? I'd like something that shows all the techs, prerequisites, etc. That doesn't seem to be anywhere in either of the manuals. I'd really wish there had been a text file with the game that showed everything.
Start a game with players set to see the entire tech tree. Then go to the tech screen You'll see buttons there that will allow you to export the whole tree to a .txt file which you can then print.
you can download a Word doco Version of the tech tree. I have not updated it yet for the patch, and I've since learnt that my "total tech costs" calculation was wrong, but the rest of the info ought to be valid (total costs ought to be in the right ballpark for comparisons of relative entry cost.)