Here is the full list of all 63 Curious Expedition achievements.
Reach world 4
Reach world 3
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 the unholy Blood Crown.
Find and dig up 10 treasures using treasure maps.
Unlock 13 explorers.
Finish a full game with a secret explorer.
True lovers don't eat their loved ones.
I just want to make sure the cat is fine.
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.
Have at least 3 members of your trek be alcoholics.
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.
Finish a full game in 3rd place.
Finish a full game on 2nd place.
Finish a full game on 1st place.
Obtain 19 golden frames.
Obtain 19 platinum frames.
Find all items
Reach world 5
Reach world 6
Succeed in 500 expeditions.
Travel through 20 portals.
Recruit 20 natives.
Visit 5 different special regions.
Recruit 5 dinosaurs.
Complete 50 harbor quests.
Hunt down and kill the legendary hyena.
Headbutt a raptor.
Flee 10 times from combat.
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.
Obtain 100 treasure items.
Kill 20 giant spiders.
Hatch 10 eggs.
Kill 10 giant walruses.