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