I'm not sure if this is a well-known error that has been reported several times in the past, but a quick scan of the first few pages and a search didn't turn anything up, so.... yeah. Also, not sure if this is technically considered a typo. Either way:
In the game, the progress tracker for the High Pain Threshold accolade lists the badges you need to acquire it. But as you can see below, it lists Relentless as one of the badges you need to get it.
But I got all of the badges it listed there and yet it wasn't awarding it, saying I was missing one. So I checked the wiki, and there it lists The Unbroken Spirit instead of Relentless.
Again, sorry if that's already widely known. Just figured I'd be sure.