Here is the full list of all 20 The Love Boat achievements.
Find all 12 different mice during gameplay
Find Ron a total of 50 times
Unlock all of the different mice
Successfully finish all tasks and bonus levels
Buy every upgrade
Finish chapter 6
Achieve 3 stars on all levels
Find all 60 mice
Finish chapter 5
Finish chapter 4
Unlock all of the cast
Earn 1000 bonus tips
Finish chapter 3
Finish chapter 2
Take a picture of every customer in Puerto Vallarta
Keep the captain's table happy throughout days 13, 14 and 15
Have 500 customers leave happy
Finish chapter 1
Let the seagull poop on Stacy's head
Finish a level with all customers leaving with 5 hearts