Tokyo_Bunny_8990: Difficulty trophies give an idea of if the difficulty is properly balanced imo. There might be something wrong if only 3% of players can beat the game on the hardest difficulty while 15% have beaten it on the second to most difficult.
Ancient-Red-Dragon: No they don't.
The reason most people don't beat the game on Hard is because:
1) most people don't spend the time to beat most of their games, period, because they have giant backlogs of games, most of which they will never have time to get around to playing much, if ever at all
and
2) most people who do play a game in the first place choose the default/normal difficulty, and they do not ever bother to play on Hard in the first place.
But if they did choose to play on Hard, and if they also did to choose to take the time to beat the game, then chances are, they would be able to do so in many or most cases.
In other words, an Achievement having a low percentage of completion on a Hard difficulty has nothing whatsoever to do with players being "unable" to earn that Achievement, and it provides zero indication whatsoever of players' supposed inability to earn it.
While I see your point, I think it is too dismissive of how achievements can provide some insight into difficulty.
1) this is accounted for by comparing the relative completion percentages. If 50% completed on normal vs 30% on hard, then its not too difficult to assume that 60% of players who beat the game can beat the game on hard difficulty. To just say only 3% completed on this game on hard is the wrong takeaway but if you see that 60% beat the game but only 3% on hard (or some hard challenge in the game), maybe there is an unexpectedly big difficulty spike there. Is that intended and ok or should the devs consider rethinking for their sequel?
2) And yet there are games with multiple difficulties where achievements result in a normal distribution (more people beat the game on normal vs hard vs very hard) despite the fact that these difficulties are available from the beginning.
In KH1, 7.1% of players got the trophy for Proud (hard) vs 26% for normal vs 31% for beginner (easy).
Re:COM, 6% hard vs 17% normal vs 22% easy
KH2, 11% for very hard vs 17% for hard vs 48% for normal + beginner (no differentiation indicators here).
The Last of Us, 40% on easy, 29% on normal, 7% on hard, 2% for very hard
Uncharted 4, 39% for easy, 35% for normal, 27% for hard, 5% for very hard
If your argument is true (most players just chose normal and dont explore other difficulties), there should be no differentiation between easy and normal or hard and very hard. It should be split into more distinct categories of normal with little to no differentiation with beginner and pretty much no differentiation for harder difficulties. You can definitely argue that normal is over-represented but to say that achievements provide absolutely no insights is also wrong.