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