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