Here are accounts of the multiplayer campaigns I've participated in, using my converters - the reason I write all this code. They come in two variants: Plain, basically as I wrote them whilie playing except that I've corrected a few typos; and commented, where I discurse on events, writing style, or whatever takes my mind before each post. Each campaign has its own section below, with links to the HTML version; there's also PDF links at the bottom of the page.
The Great Game
The first (to my knowledge) multiplayer megacampaign! Here the Ynglings make their first appearance, and gain a rather ripe reputation for double-dealing, dishonesty, and sneakiness as early as the CK phase, with its assassination mechanism.
The Sons of Raghnall
The fourth megacampaign, and the first to use the vastly-improved Crusader Kings II - with the first four DLCs: Sword of Islam, The Republic, Legacy of Rome, and Sunset Invasion. It is not yet completed; however, the life of my first king forms a story arc of its own, and is thus available as a separate PDF.
The Ragnvald Arc (PDF)