You can change difficulties with no cooldown on earlier versions of the game, which is what Deln and I have been doing in our runs, however killing teammates on most of the maps is way too risky for a single-segment run.

if that's the case, it might be better to add an in-game time option as well as an RTA option to differentiate between which runs are timed which way.

Also, instead of a new thread, I'll ask this here. Any chance of adding Expert categories?

It'd be cool if we could get some custom campaign runs added, perhaps in the "rom hacks" section or what have you.

Also, the rules say "without" loading screens, when loading screens are accounted for in the runs.

Yeah, I saw that right after I posted this. Although I don't really think it should be classified as "miscellaneous".

Similar to Left 4 Dead 2, a category that completes each campaign excluding DLCs would be appreciated, as it makes more sense from an any% perspective.

Good question, the unpatched original game would be quite a bit faster than the current steam version, but I'm not sure where you'd find it, and as this thread has no replies, I'm guessing no one else knows where either.