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The 22 achievements

Last edited by David Bloomin · 2d ago ·

The 22 achievements

The canonical Crafter list, by name and in the canonical order. This ordering is results.achievementIds, the order of the viewer's checklist and the order of the locked list in the observation.

Each unlocks once, permanently, the tick its predicate first becomes true, and is never revoked. results.achievementUnlocked[i] is the boolean and results.achievementTick[i] is the tick it lit, or -1.

The only number the league reads is how many of them you unlocked before you died: scores[0] = 10000 * achievementsUnlocked + survivalTicks. One more achievement is worth 10 000 and the largest possible survival term is 1344, so achievements always dominate and survival is purely the tie-break.

#	id	Unlocks when	What it needs first
1	`collect_wood`	a `do` on a `tree` yields wood	nothing — bare hands on a tree
2	`place_table`	a `table` is placed	1 wood
3	`eat_cow`	a cow is reduced to 0 HP by the cog	a cow in reach; `do` it two to four times
4	`collect_sapling`	a `do` on `grass` yields a sapling (a 1-in-10 draw)	nothing; the draw is 1-in-10 per `do` on grass
5	`collect_drink`	a `do` on `water` raises `drink`	water in front of you
6	`make_wood_pickaxe`	the recipe succeeds	1 wood, a table within one cell
7	`make_wood_sword`	the recipe succeeds	1 wood, a table within one cell
8	`place_plant`	a sapling is planted	1 sapling, facing grass
9	`defeat_zombie`	a zombie is reduced to 0 HP by the cog	a sword helps; bare hands do 1 damage a tick and a zombie has 5 HP
10	`collect_stone`	a `do` on `stone` yields stone	a wood pickaxe
11	`place_stone`	a stone is placed	1 stone
12	`eat_plant`	a `do` on a `ripe plant` raises `food`	a sapling you planted 120 ticks ago
13	`defeat_skeleton`	a skeleton is reduced to 0 HP by the cog	a sword, and a skeleton — they live on cave floor
14	`make_stone_pickaxe`	the recipe succeeds	1 wood + 1 stone, a table within one cell
15	`make_stone_sword`	the recipe succeeds	1 wood + 1 stone, a table within one cell
16	`wake_up`	a run of >= 1 `sleep` ticks that began with `energy < 9` ends with `energy == 9`	sleep from below full energy until it reaches 9
17	`place_furnace`	a `furnace` is placed	1 stone
18	`collect_coal`	a `do` on `coal` yields coal	a wood pickaxe
19	`collect_iron`	a `do` on `iron` yields iron	a stone pickaxe
20	`make_iron_pickaxe`	the recipe succeeds	1 wood + 1 coal + 1 iron, a table and a furnace within one cell
21	`make_iron_sword`	the recipe succeeds	1 wood + 1 coal + 1 iron, a table and a furnace within one cell
22	`collect_diamond`	a `do` on `diamond` yields a diamond	an iron pickaxe

The tech tree, as a shape

  chop a tree            -> wood
  place_table (1 wood)   -> you can now craft, but only while STANDING NEXT TO IT
  make_wood_pickaxe (1 wood)      make_wood_sword (1 wood)
  mine stone (needs wood pickaxe) -> stone
  make_stone_pickaxe (1 wood + 1 stone)   make_stone_sword (1 wood + 1 stone)
  place_furnace (1 stone)
  mine coal (wood pickaxe), mine iron (STONE pickaxe)
  make_iron_pickaxe / make_iron_sword (1 wood + 1 coal + 1 iron, needs table
    AND furnace both within one cell of you)
  mine diamond (needs IRON pickaxe)

Six of the twenty-two are not on the tree at all — eat_cow, collect_drink, collect_sapling, place_plant, eat_plant and wake_up are the survival half — and two more, defeat_zombie and defeat_skeleton, are the price of being outside after dark. That split is the whole game: every step down the tree costs ticks you needed for water, and every night you sleep through is a night you did not spend mining.

The paper's aggregate

Crafter's published score

S = exp( (1/22) * sum_i ln(1 + 100 * p_i) ) - 1

where p_i is the success rate of achievement i across a run of episodes, is a cross-episode aggregate: a single episode has no success rate, only a boolean per achievement. This coworld therefore reports the per-episode integer above — which is what a league round can rank — plus the raw material the aggregate needs, and tools/crafter_score.py does the aggregation over a directory of results.json files:

python3 tools/crafter_score.py path/to/results/

It needs at least ten episodes to mean anything, and it is not what the ladder ranks.