How useful was the AD&D Core Rules CD?

[Glyfair]

There was even a downloadable expansion to the Expansion that added The Complete Book of Necromancers, which was one of my favorite 2E sourcebooks.

There still is (in the WotC Electronic Support page). I recently upgraded to a new computer and my CC2 installation was an upgrade. So, I had to install the Core Rules (so the Campaign Mapper was on my computer) and while I was add it, I upgraded it including this book.

 

[Sammael]

I still reference the 2.0 version occasionally. Lots of those 2e books had usable stuff beyond the mechanics, and they're invaluable for rules discussions.

 

[JRRNeiklot]

Core Rules was incredible. The ability to add anything at a moment's whim was awesome. It made Etools look like a doorstop. Of course, it's useless if you play 3e, though.