It turned out to be SNOWMAN but there was a space that was added when I typed it due to my keyboard glitching out I guess. Thanks for trying to help though.
People still seem to be struggling with unlocking expedition chests, so I figured I'd skim the game code and post the complete list here. As of v0.25.3, there are 19 chests: 1 tutorial, 17 randomised, and 1 missable Patreon exclusive (linked to the Snow White Gold Coin quest).
Note: As the game tells you, all codes must be entered in capital letters only, with no spaces or punctuation. Three of the chests have a couple of accepted answers; these are separated by a forward slash [/]. Only enter one of the 2 codes.
Tutorial Chest:
Prompt
Code
DO YOU WANT TO BUILD A
SNOWMAN
This chest should always be your first and will always contain 1 Character Data.
Random Chests:
Prompt
Code
PI (3 DIGITS)
314
THE ANTIC BOOK OF LOVE
KAMASUTRA
GUESS I'LL
DIE
MODERN PROBLEMS REQUIRE MODERN
SOLUTIONS
ELEVEN IN ROMAN NUMERALS
XI
ROMEO AND
JULIET
IT'S LEVIOSA NOT LEVIOSAAAAA
HERMIONE / HERMIONEGRANGER
DO YOU KNOW DA
WAE / WAY
SILVER FOR
MONSTERS
SUCH BEAUTY MUCH WOW
DOGE
WINNER WINNER CHICKEN
DINNER
I TOOK AN ARROW IN THE
KNEE
THIS VIDEO IS SPONSORED BY
RAIDSHADOWLEGENDS / NORDVPN
THEYRE TAKING THE HOBBITS TO
ISENGARD
A SOUL FOR A
SOUL
HANS... GET ZE
FLAMMENWERFER
TOSS A COIN TO YOUR WITCHER OH VALLEY OF
PLENTY
These chests all have an equal chance of appearing. You should only be able to find each one once.
After rolling for a 1/25 chance of finding 'TREASURE!' (80-250 credits), there will be a 1/30 chance to discover a locked chest. After all chests have been unlocked, generic credits will be granted instead (1-65 credits based on drone distance).
Note: If you have already used the Crowned Coin to end Snow White's "The Wishing Well" quest, this chest (and all remaining gold coins) will become unavailable and unusable.
This chest can only be found at a drone distance of 4-6 (stone tower, abandoned village or abandoned church)
The code cannot be entered until you've progressed through the patreon quest and been told the code in-game. You should then find the chest a second time and be able to enter the code.
"Really? Don't you remember what you're supposed to do? "
"Yeah... I kind of forgot. "
"You have to type: ''10000000000'' with ten 0."
Opening this chest will grant you the 'Unintelligible data', allowing you to get the Two-Headed Coin.
Some serious lack of Internet culture if you can't figure the chest codes out. And some actual culture as well (Really?! You don't know the first three digits of pi?)
People still seem to be struggling with unlocking expedition chests, so I figured I'd skim the game code and post the complete list here. As of v0.25.3, there are 19 chests: 1 tutorial, 17 randomised, and 1 missable Patreon exclusive (linked to the Snow White Gold Coin quest).
Note: As the game tells you, all codes must be entered in capital letters only, with no spaces or punctuation. Three of the chests have a couple of accepted answers; these are separated by a forward slash [/]. Only enter one of the 2 codes.
Tutorial Chest:
Prompt
Code
DO YOU WANT TO BUILD A
SNOWMAN
This chest should always be your first and will always contain 1 Character Data.
Random Chests:
Prompt
Code
PI (3 DIGITS)
314
THE ANTIC BOOK OF LOVE
KAMASUTRA
GUESS I'LL
DIE
MODERN PROBLEMS REQUIRE MODERN
SOLUTIONS
ELEVEN IN ROMAN NUMERALS
XI
ROMEO AND
JULIET
IT'S LEVIOSA NOT LEVIOSAAAAA
HERMIONE / HERMIONEGRANGER
DO YOU KNOW DA
WAE / WAY
SILVER FOR
MONSTERS
SUCH BEAUTY MUCH WOW
DOGE
WINNER WINNER CHICKEN
DINNER
I TOOK AN ARROW IN THE
KNEE
THIS VIDEO IS SPONSORED BY
RAIDSHADOWLEGENDS / NORDVPN
THEYRE TAKING THE HOBBITS TO
ISENGARD
A SOUL FOR A
SOUL
HANS... GET ZE
FLAMMENWERFER
TOSS A COIN TO YOUR WITCHER OH VALLEY OF
PLENTY
These chests all have an equal chance of appearing. You should only be able to find each one once.
After rolling for a 1/25 chance of finding 'TREASURE!' (80-250 credits), there will be a 1/30 chance to discover a locked chest. After all chests have been unlocked, generic credits will be granted instead (1-65 credits based on drone distance).
Note: If you have already used the Crowned Coin to end Snow White's "The Wishing Well" quest, this chest (and all remaining gold coins) will become unavailable and unusable.
This chest can only be found at a drone distance of 4-6 (stone tower, abandoned village or abandoned church)
The code cannot be entered until you've progressed through the patreon quest and been told the code in-game. You should then find the chest a second time and be able to enter the code.
"Really? Don't you remember what you're supposed to do? "
"Yeah... I kind of forgot. "
"You have to type: ''10000000000'' with ten 0."
Opening this chest will grant you the 'Unintelligible data', allowing you to get the Two-Headed Coin.