So, a mod in a game I'm supermod at (http://www.speedrun.com/mcm_hsp) just messed up and deleted about half of the runs on accident (furthermore, it was because the other half was now invalid due to an update, so, technically, he deleted ALL the runs). Is there any possibility of getting that undone? I understand that, depending on how the site works internally, that may be impossible, but it would be great if it was possible.

Are you sure they "deleted" half the runs, or are they missing because of some for of variable that has been added or removed? Because you can't accidentally delete half the runs.

You'll have to ask an admin for a rollback. They'll likely notice this thread at some point.

@Ozotuh Yeah, what happened is that the game had 2 categories, and one had become invalid so he intended to delete it, but accidentally deleted the other. It's a really silly as he himself has noted (http://www.speedrun.com/mcm_hsp/thread/6d6vf)

@ROMaster2 We were expecting something like that to be possible. We're now relieved that there's chance it can be done.

If you just deleted the category, then I believe if you put the category back everything should return (I believe it's character sensitive so you'd need capitalisation to be the same.)

On a side note, why not just make the redundant category a miscellaneous one and make a note in the rules that it's retired? That way the records are still shown, but not on public display.

Well, that would have been a smart idea. Also I can't seem to recall the rules for the category that was deleted.

Even if you delete them from this site, though, aren't the videos still out there? Because the videos are linked to external sources rather than uploaded, the videos aren't necessarily gone. If you know what to look for, they should still be out there. A quick youtube and twitch search for speedruns of a certain game should net most if not all of the missing links unless I am misreading the question?