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