Here is the full list of all 18 Girls Overboard achievements.
You've used 25 Fresh Water
Unlock all Gallery Illustrations
You've completed the tutorial!
Max relationship with Lisa
Max relationship with Emerelda
Max relationship with Claudia
Max relationship with Ami
Max relationship with Octavia
Max relationship with Coraleen
Max relationship with Miya
Unlock all 7 main love interests.
You've given total of 100 Gifts
You've purchased 10 five-star Outfits
You've Cast Net 1,000 times
You've max out the Net Upgrade
You've earned $1,000,000 in Sand Dollars
You've used Sell All Gems a total of 50 times
You Max Relationship with 7 main love interests.