Here is the full list of all 38 Castaway Paradise Complete Edition achievements.
Rebuild the Lighthouse
Rebuild Angus' Trailer
Read 50 chit chats
Rebuild Francis' Pirateshack
Make a profit of 5000 gems on the Stock Market
Rebuild Victoria's Mansion
Completed 100 quests
Grow every type of crop
Live the luxury life of a VIP
Rebuild Amelia's Planehouse
Unlocked a gate
Remove 25 cobwebs
Donate 15 shells
Make a profit of 500 gems on the Stock Market
Unlock the second room in your house
Harvest 50 crops
Donate 15 fish
Donate all bugs
Donate 15 bugs
Collect 25 pieces of garbage
Rebuild Harold's Museum
Make a profit of 2000 gems at the Bank
Remove 50 weeds
Used every piece of equipment
Changed every piece of outfit
Wore an outfit of the opposite gender
Donate a collectable
Completed 25 quests
Rebuild a bridge
Rebuild Gustave's Bakery
Remove 25 stones
Get your first collectable
Completed the tutorial
Donate all fish
Donate all shells
Donated every collectable
Grow every type of fruit
Grow every type of flower