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