Hey all I play Warzone 2100. http://www.wz2100.net
It is free and a great game with an AI beyond it's years.
The Tech tree is 400 Techs long.

I host several games a week ( or try to) and I have an Xfire group set up as well. PM me or Post if you would like to either learn to play or join up.
I am working on making a poster sized Tech Tree for easier reading.

Here is the Link to the site I am using to make the Tech Tree: http://bubbl.us
I could really use some help as this is rough doing so on your own. The link to the Tech Tree is Warzone 2100 Tech Tree
If you help me with this Tech Tree, I will send you a poster sized one when it is completed for free. Else, I will be selling it on the B/S/T Forum and or Ebay.
PM me your Username on Bubbl.us and i will add you to the editing list.

I look forward to both gaming and editing with you. ^_^
Cheers!!