The six hardest
Under 2.6% there are six: Master of Steel 1.0%, Challenge Master 2.0%, The New Beginning 2.6%, Spirituality 2.8%, Explorer 4.0% and Master Alchemist 4.4%.
Below 2.6% the achievements stop being about skill and start being about how much of the map you are willing to walk.
Every figure below is checked against Pequi studios announcements or Steam's own endpoints on 2026-11-09.
Six achievements sit below 2.6%. In order of rarity they are Master of Steel, Challenge Master, The New Beginning, Spirituality, Explorer and Master Alchemist. Together they define the end of the game, and three of the six are not difficult so much as long.
Six, and what each one wants
| Achievement | Rate | Requirement | Type |
|---|---|---|---|
| Master of Steel | 1.0% | Craft 40 steel plates | Long grind |
| Challenge Master | 2.0% | Complete all challenge islands | Skill and time |
| The New Beginning | 2.6% | Complete the main story | Story completion |
| Spirituality | 2.8% | Obtain the Spirituality Crystal | Story gate |
| Explorer | 4.0% | Visit all islands | Navigation |
| Master Alchemist | 4.4% | Craft 10 medium potions | Resource chain |
Master of Steel: 1.0%
Forty steel plates. The rarest achievement in the game, rarer than finishing the story, and the reason is arithmetic rather than difficulty. Steel sits at the top of the metal ladder, above copper, iron and gold, and plates are a processed material that costs multiple ingots each.
The realistic plan is to build the steel production before you start counting. A furnace running continuously, a fuel supply that does not depend on foraging, and enough storage to hold the output. Forty plates is not a fight; it is a factory with a quota.
Why almost nobody does it: there is no gameplay past steel. The story does not require it, the islands do not require it, and the achievement is the only reward. At 1.0%, this is the achievement for people who have already decided to finish the list.
Challenge Master: 2.0%
Complete all challenge islands. The existence of challenge islands is confirmed by this achievement and by nothing else in the store page's marketing, which describes a game with no forced objectives. Challenge islands are the exception to that design: they are separate content, they are harder, and completing all of them is rarer than finishing the story.
That ordering tells you something. Challenge content added for players who want difficulty is completed by fewer people than the story is, which is what you would expect, but the gap is only 0.6 percentage points. The players who find the challenge islands mostly finish them.
No count of challenge islands is published. Twelve? Six? The achievement does not say and no announcement does either. What is documented is that they exist and that finishing the set is one of the six rarest things in the game.
New Beginning: 2.6%
Finish the main story. The gating is not the final encounter, it is the crystal chain that leads to it: Spirituality sits at 2.8%, two-tenths above the ending. Nearly everyone who obtains the third crystal finishes the game.
Practically, this achievement is the third crystal. Plan the route around Spirituality, not around the ending, and the ending takes care of itself.
Spirituality: 2.8%
The third crystal and the real bottleneck. Power is 19.4%, Wisdom is 8.4%, Spirituality is 2.8%. Each link in the chain loses more than half the players who reached the previous one.
The useful frame here: the search is the content. The game has twenty-four islands and does not publish crystal locations, so this achievement is a map-reading exercise rather than a boss fight.
Explorer: 4.0%
Visit all islands. Twenty-four hand-crafted islands, no published map, and four percent completion. For comparison, that is more players than have obtained the Spirituality Crystal at 2.8%, which means a meaningful group explored the whole archipelago without finishing the crystal chain.
The most achievable of the six for anyone who likes sailing. It requires food, a raft and patience, all of which are covered on the raft page. Twenty-four islands at, say, twenty minutes each is eight hours of pure travel, plus the time to gather food for it.
Master Alchemist: 4.4%
Craft ten medium potions. The odd one out: the only achievement on this list that is a crafting count rather than a completion milestone. Alchemist, for five potions of any kind, is 13.4%; ten medium potions is 4.4%.
The gap between those two rates describes a specific wall: making any potion is three times more common than making ten medium ones. Medium potions require the alchemist's machine, which the 9 November patch moved into a cave after a bug made it disappear. A machine missing on an older build has its explanation.
Effort order
| Order | Achievement | Reasoning |
|---|---|---|
| 1 | Explorer (4.0%) | Pure travel; uses systems you already have |
| 2 | Master Alchemist (4.4%) | A resource chain you can run passively |
| 3 | Spirituality (2.8%) | The story gate; unlocks the ending too |
| 4 | The New Beginning (2.6%) | Falls out of the previous step |
| 5 | Challenge Master (2.0%) | Separate content, needs a built character |
| 6 | Master of Steel (1.0%) | Last because it rewards nothing but itself |
That ordering is by effort, not by prestige. Explorer first because a raft and a food supply get you there, and the achievement is 4.0% for a reason: it is the endgame goal most players can actually reach.
How to read a global rate
Global unlock percentages include everyone who owns the game, including people who launched it once. That inflates the Common tier and deflates everything else. The 1.0% on Master of Steel is not one in a hundred dedicated players; it is one in a hundred owners. Among players who have finished the story, the rate for steel plates is far higher, but Steam does not publish conditional rates.