Here is the full list of all 63 Curious Expedition achievements.
Recruit 20 natives.
Complete 50 harbor quests.
True lovers don't eat their loved ones.
Headbutt a raptor.
Have at least 3 members of your trek be alcoholics.
Finish a full game on 2nd place.
Finish a full game on 1st place.
Obtain 100 treasure items.
Hunt down and kill the legendary hyena.
Find the unholy Blood Crown.
I just want to make sure the cat is fine.
Finish a full game in 3rd place.
Reach world 6
Reach world 5
Reach world 4
Kill 20 giant spiders.
Reach world 3
Flee 10 times from combat.
Reach world 2
Blow up 50 mountains
Revive 10 trek members at altars.
Stay inside a portal world for 100 days.
Sell items worth 100000 funds.
Donate items worth 100000 fame.
Eat 500 chocolate rations.
Collect 50 butterflies.
Create 50 paintings.
Create 50 anthropological studies.
Find and dig up 10 treasures using treasure maps.
Unlock 13 explorers.
Finish a full game with a secret explorer.
Find an extraordinary friend.
Return what belongs to an altar.
Obtain a rare creature from the beast master.
A chalice awaits beyond the face.
There is something to find in every region.
Seeing London from above.
Finish a full game without your standing ever dropping below 0.
Blow up an active volcano with dynamite.
How many abominations can you handle?
Finish a full game without selling anything to the auction house.
Finish a full game using no sanity item other than coca leaves.
Use your hot air balloon to escape an expedition.
Survive the tutorial.
Finish a full game and recruit nobody at the harbor or villages.
Obtain 19 golden frames.
Obtain 19 platinum frames.
Find all items
Succeed in 500 expeditions.
Travel through 20 portals.
Visit 5 different special regions.
Recruit 5 dinosaurs.
Kill 100 hyenas.
Defeat a slave trader and free the slaves.
Kill 20 crocodiles.
Kill 10 giant birds.
Kill a giant crab.
Kill 10 giant scorpions.
Hatch 10 eggs.
Kill 10 giant walruses.