Quote Originally Posted by Daniolaut View Post
According to lalachievements, the hardest achievement is "The Deeper End IV" which is to completely clear a Thief map dungeon 20 times.

3 characters have earned this worldwide.

The "Tile and Error III" which is "harder" than the one you're mentioning is much "easier."

327 characters have earned this title.

Just have to put more time into I suppose.
TBF, I suspect most of those 327 are on the JP datacenters.

A friend of mine who plays mahjong seriously in the offline world will queue for it in FFXIV here in NA and literally be stuck in queue for an hour and a half. A friend over on the JP datacenters who also plays mahjong seriously can queue and have a match within 5-10 minutes. This means the friend in the JP datacenters can literally just play more matches, and have more opportunities to get that achievement than my NA friend does.

Meanwhile, the drop rate on the thieves' maps (i.e., "abysmal") is global, and the chance that you will pick the correct door and make it all the way to the lowest level on any one of those drops is also Not Great. So it's not like JP datacenter folks have some advantage on getting that achievement there.