Does no one who regards this box of new tech trees so highly actually know how to play? (quartertothree.com)
There's a fairly large tech tree for both your empire and dragon form abilities, many of which become crucial to success as the enemy progresses technologically. (darkstation.com)
There is also a dynamic tech tree system which changes what technologies you can research with each new game you play which keeps things interesting as you'll have to adjust to different strategies. (download-free-games.com)