What this skull list covers
The tables below contain 21 named skulls whose conditions were published in official Steam update notes. The version column shows where each rule was documented; later official notes through 1.6 were checked for a stated replacement. That is documentary evidence, not a fresh runtime test.
The game has more skulls than the entries below. A complete 1.6 denominator, every unlock, every color value and cross-platform parity remain unknown, so this page does not calculate a completion percentage.
Update 1.6: four documented skulls
Official update 1.6 introduced these four conditions. Each reward cell lists separate published variants: the Bones, Mult and reroll values are alternatives, not one combined payout. Purple values were not published in the announcement and are not inferred.
| Skull | When it checks | Documented condition | Published variants |
|---|---|---|---|
| Judge | When playing a hand | No die shows 1 or 6 | 15 Bones / 3 Mult / 2 rerolls |
| Welder | When playing a hand | At least four dice show 3 or 4 | 15 Bones / 3 Mult / 2 rerolls |
| Musketeer | During a level | Reach the middle hand of the level | 15 Bones / 3 Mult / 2 rerolls |
| Drilled | When playing a hand | At least two of the middle three dice match the first or last die | 15 Bones / 3 Mult / 2 rerolls |
Judge and Welder condition examples
The sequence 2-3-3-4-4 satisfies both published conditions: it has no 1 or 6, and four dice show 3 or 4. The sequence 1-3-3-4-4 satisfies Welder but fails Judge because it contains a 1.
These are deductions from the announced conditions. They are not gameplay captures and do not establish the hand rank, score, activation order or whether the hand wins a level.
Update 1.5: six documented skulls
These six conditions were published with update 1.5 and checked against later official notes through 1.6. Ambiguous edge cases are left unresolved rather than converted into a calculator.
| Skull | Documented condition when playing a hand | Published variants |
|---|---|---|
| Half | Difference between the first two dice equals the difference between the last two | 10 Bones / 2 Mult / 1 reroll |
| Chieftain | At least two of the middle three dice are equal | 10 Bones / 2 Mult / 1 reroll |
| Shaman | Sum of odd-valued dice is greater than the sum of even-valued dice | 10 Bones / 2 Mult / 1 reroll |
| Hacker | Official wording: the dice sum is divisible only by itself | 15 Bones / 3 Mult / 2 rerolls |
| Nailed | First and last dice plus at least one other die have the same value | 15 Bones / 3 Mult / 10 Bones + 1 Mult / 2 rerolls |
| Queen | Number of distinct die values is lower than rerolls spent on the hand | 15 Bones / 3 Mult / 5 Bones + 2 Mult / 2 rerolls |
Updates 1.4 and 1.3: six documented skulls
The reward values again describe different color variants. They must not be added together.
| Version | Skull | Documented condition when playing a hand | Published variants |
|---|---|---|---|
| 1.4 | Knight | The hand count is even | 10 Bones / 2 Mult / 1 reroll |
| 1.4 | Inventor | At least one die equals the difference between its two neighbors | 10 Bones / 2 Mult / 1 reroll |
| 1.4 | Spiked | Number of odd-valued dice equals the middle die value | 15 Bones / 3 Mult / 2 rerolls |
| 1.4 | Pot | Sum of all dice is greater than 22 | 10 Bones / 2 Mult / 1 reroll |
| 1.3 | Ace | Sum of the three lowest dice is at most the highest die | 15 Bones / 3 Mult / 2 rerolls |
| 1.3 | Bachelor | Second die multiplied by fourth die is at least the sum of all dice | 15 Bones / 3 Mult / 2 rerolls |
Update 1.2: five documented skulls
These entries were introduced in official update 1.2. Later notes were checked through 1.6; Dealer's later English wording refers to hand rank rather than the total value of the dice.
| Skull | Trigger | Documented condition | Published variants |
|---|---|---|---|
| Blank | Challenge availability | No effect; encountered only in some challenges | None |
| Ritual | When playing a hand | Sum of the middle three dice is divisible by 3 | 10 Bones / 2 Mult / 1 reroll |
| Gamer | When playing a hand | First and last dice sum to the hand count or reroll count | 15 Bones / 3 Mult / 2 rerolls |
| Mercy | After the last reroll | Only one hand remains; once per level | 20 Bones / 4 Mult / 2 rerolls |
| Dealer | After a reroll | The reroll lowers the hand rank; once per hand | 10 Bones / 2 Mult / 1 reroll |
Four later rule changes and history notes
These records cannot safely be turned into full current rows because the cited announcements do not provide every current field.
| Skull | Documented change | What remains unknown |
|---|---|---|
| Choked | Update 1.3 changed the rule so the largest group of equal dice can match the hand count or reroll count; published variants became 10 Bones, 2 Mult or 1 reroll. | Current runtime behavior was not reproduced. |
| Drinking | Update 1.3 allowed the highest or lowest die to equal the hands remaining; the older rule checked only the lowest die. | The announcement does not publish all current color rewards. |
| Split | Update 1.5 changed the condition from value symmetry to sum symmetry. | The announcement does not define the exact sum groups, so no checker is supplied. |
| Astronaut | Added in 1.2, strengthened in 1.5 and fixed in 1.5.3 for the one-fewer-hand challenge. | Its old 1.2 rewards are not treated as current values. |
How skull colors relate to rewards
A community-authored compendium describes blue as Bones, red as Mult, purple as a Bones-and-Mult combination and yellow as rerolls; it also says same-name colors share a trigger. This is useful orientation, but it is not current official runtime proof.
Use the current in-game card to confirm the color and exact value. Do not combine the alternatives in a table row, and do not estimate an unpublished purple value from the blue and red variants.
| Color | Community compendium meaning | Verification rule |
|---|---|---|
| Blue | Adds Bones | Confirm the current card value |
| Red | Adds Mult | Confirm the current card value |
| Purple | Adds Bones and Mult | Do not derive missing values |
| Yellow | Adds rerolls | Confirm timing and current value |
Find a skull in the in-game compendium
Official update 1.6 says the Achievements menu also works as a skull compendium: select the matching skull achievement to view detailed information. The announcement does not establish how much information is visible for locked achievements.
Treat the in-game entry as the final check when it differs from an older announcement or a community guide. Record the platform and version with any correction.
Known gaps before this can be a complete list
The complete 1.6 skull denominator, every color-specific value, unlock requirements, locked-entry visibility and cross-platform parity have not been established. The tables intentionally stop at the official facts that can be traced to the cited updates.
- No complete 1.6 catalog or completion percentage
- No inferred purple rewards
- No deterministic checker for ambiguous edge cases
- No claim that every documented rule was reproduced in the current game