Here is the full list of all 60 Curious Expedition 2 achievements.
Return a Pale Mask trek member to normal
Finish the campaign without dying
See all campaign endings
Finish 20 three-skull expeditions
Kill 100 hyenas
Finish the campaign on Adventurer difficulty
Fully complete 5 Anthropology checklists
Allow an Abomination to eat a party member
Put on a hat
Participate in a Club Competition
Complete 20 village quests
Promote a character 100 times
Lux Labs: Reach max club level
The Taishi Academy: Reach max club level
Complete an island with nothing equipped
Complete an island with an all-animal party (excluding leader)
Fail Director Mode
Collect 50 butterflies
Play the entire campaign without killing anything in combat
Finish the campaign with at least 10000 total Fame
Fully complete a Cartography map on a 4-region island
Unlock all explorer classes
Complete 5 islands without killing anything in combat
Ride a dinosaur
Raise a dinosaur from egg to adulthood
Successfully complete 100 dice challenges
Kill a Giant Sandworm
Discover 500 locations
The Royal Avalon Society: Reach max club level
Tame the mysterious Red Elk
Promote a character to max level
Meet a ghost
Complete a year of Director Mode
Have a Pale Mask as a member of your trek
Rob 10 Shrines
Complete a standard expedition (non-story) without buying anything from the Ship Shop
Finish the campaign on Traveller difficulty
Learn a tribe type 10 times
Find buried treasure 10 times
Kill 30 animal groups
Bring back 500 fame of items in one expedition
Complete Act III
Kill an enemy using the environment
Enter a Portal to a Corrupted world and return back
Complete Act II
Discover 15 locations
Complete a year without your Standing ever dropping below zero
Complete Act I
Win all rounds of the drinking contest
Complete an island without resting
Finish the first expedition in 1886
Earn 100000 total fame
Free the salamander prince
Witness a cross-species love affair
Find buried treasure 50 times
Finish the campaign on Lunatic difficulty
Get a character with 6+ mental ailments
Complete Director Mode
Complete 10 years of Director Mode
Have the Inspector return to your service