The Polynesia Add-on for Sid Meier's Civilization V has 10 achievements.
Win as Hiva
Win as Samoa
Beat the game on any difficulty setting as Kamehameha.
Win as Tahiti
Find Australia in a South Pacific map game
Win as Tonga
Find Easter Island in a random map game
Find New Zealand in a random map game
Encounter Captain Cook
Find Hawaii in a random map game