Here is the full list of all 19 Tropical Liquor achievements.
Create a bond with Kei
Create a bond with all the girls
Create a bond with Ema
Create a bond with Anna
Create a bond with Erika
Create a bond with Lisa
Create a bond with Naomi
Create a bond with Sakurako
Create a bond with Karen
Confess to one of the girls
Reach Day 29
Go on a date with one of the girls
Win the Liquor Game on Hard
Reach Day 15
Win the Liquor Game on Normal
Clear the Tutorial
Win the Liquor Game on Easy
Clear the Prologue
Welcome to Tropical Island!