I've shared this link elsewhere, but I've been a little hesitant to let this out into a wide audience. This is a compendium of some of the baseline lore behind the game, along with a lot of advice for role-playing in CO. There have been numerous requests over the years for game lore to be more widely available, hopefully this helps fill that informational void a little.
As I mention in the document, this is *NOT* a substitute for the commercially available books. If you like what you see here, please consider purchasing from Hero Games. That said, the document covers a fair bit of territory, so if Hero or Cryptic feel it's an infringement, it will be taken down.
The link is here:https://drive.google.com/file/d/0BzHmfdC4jXPpOXNPQW5NZ1o2SzA/view?usp=sharing
Please note that anything labelled "Opinion" is just that, and not canon. Furthermore, people should feel free to ignore the information as they see fit, this is not meant to be a straightjacket. Much of the book is intended for an audience of Champions Online RPers, and can be ignored by non-RPers who are merely interested in the setting.
If you have problems with the link, let me know. I've had trouble with links on Google Drive in the past.