Versions of the Birthright D20 Rulebook(BRCS)

[Grinster]

Does anyone have an accurate list of how many versions of the Birthright rules have been created and how to access these versions? I created an online Birthright game a few years back with PCs using Anuire realms that was based on the original Birthright d20 Campaign Setting Rulebook version 0.0 rules (I actually still have an electronic copy). Now my gaming group wants me to DM another online game and I've chosen the Brechtur realms for our new playground.

While doing some Internet searches during my electronic board setup I found multiple version of the original Birthright d20 Campaign Setting Rulebook or Birthright Rules (versions 1.3, 2.1, and 3.0 draft 8). I'm trying to find all the different versions so I can review the changes made to each version and understand why the modifications were made. I am also trying to see how easy or how difficult it would be to incorporate some of the older rules that I really liked into the most updated version of the rules.

Any insight would be greatly appreciated.