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