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