Thread:NoWayThisUsernameIsAlreadyOwnedBySomeone/@comment-26818419-20150920112711/@comment-26143371-20150920121059

If I'm correct they are exactly the ones listed in the tutorial section of Template:Quests (not counting the premium ones listed there of course).

The new categories don't show up as auto-complete suggestion directly. The list is cached and only gets updated when a cron-job runs on the server. Simply copy-paste the pagename and it will work anyway.

Categories can't be renamed. This is a "feature" of the core MediaWiki software. You need to create a new one, and I will delete the old one for you :)