In its current state, the leaderboards only accommodate runs with the Calamity mod. But this doesn't have to be the case. Calamity fits nicely into the level leaderboard layout, but has also warranted a subcategory that applies exclusively to that mod.

Categories for other mods can instead be made on the Full-Game Leaderboards. This approach will help avoid subcategory conflicts, make clearer separation between mods, and allow for more categories than would be reasonable to pack into the level leaderboard grid.

This is an invitation for runners, and perhaps even communities, to request speedrun categories for different mods here. There is really no limit to how many can be added. If needed, the objective itself could be a subcategory dropdown, with just 1-2 "category" tiles per mod.

The fact that Level Leaderboards will remain the default view for tmodloader as a whole shouldn't cause much friction if the other mods' communities use the full-game link to navigate to the leaderboard - https://www.speedrun.com/tmodloader/leaderboards

For the moment, the rule of thumb will be that the person requesting a category must complete at least one run to submit into that category. I will work with the person requesting it to set up the categories and rules; and if there is ample interest in speedrunning the newly added mod from its community, we may discuss assigning Verifier or Moderator rank to the mod's maintainer(s).