House of the Divided Mind
This campaign started on Rolegate with 40 players, and eventually migrated to a Discord campaign. Due to the format (and to my naivety) we eventually had over 300 Discord channels, one for each major location in the story.
The PDF below contains the entire story, from Rolegate to Discord. Chapter 1 contains the entire story in chronological order, mimicking the experience of someone who was in the server at the time, and privy to every channel (except a few key secret ones). Every chapter after Chapter 1 is an archive of a particular story channel, presented in alphabetical order.
The PDF is approximately 22,000 pages long. I will tweak it over time, fixing errors and adjusting minor formatting issues.
Download the PDF here: Strahd Chat Log