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