Ultimately I found it through the Wikipedia page, but here's the whole story.
One day I had a sore throat that had kept me up much of the night, so I called in sick to work in the morning. Looking for something to torrent while no one was around using the bandwidth, I searched for some old games. I wasn't searching for, nor had I ever heard of, Arcomage, but it came up on an otherwise unsuccessful search for something else thanks for several paragraphs of story that were attached to the file. I downloaded it, enjoyed it, and decided to search for more information, leading me to the Wikipedia page and, finally, here.