The subcategories of Original Campaigns that were on the main L4D2 leaderboard (Solo, Co-Op, and their expert realism variants) have moved to this leaderboard. This was meant to be done many months ago, but the time and motivation simply didn't exist to make it happen. Unfortunately, due to limitations of speedrun.com and how the category extensions board is laid out, this does mean we lost the players variable (the variable used to filter co-op runs for 2P/3P/4P), and overall, the way the subcategories look on the board is a bit ugly, but it is what it is.

If you have any questions, feel free to ask in the speedrunning Discord.