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