Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Largo Embargo Complete (25 points): Complete Part One: Largo Embargo.
Four Map Pieces Complete (25 points): Complete Part Two: Four Map Pieces.
LeChuck's Fortress Complete (25 points): Complete Part Three: LeChuck's Fortress.
A True Pirate (25 points): Complete the game.
Speed Demon (25 points): Finish the game in under three hours.
Monkey Master (20 points): Beat the game without using one hint.
Free Thinker (10 points): Beat the game using fewer than 10 hints.
Old School (5 points): Switch to classic mode at least once.
Five Minutes Later... (10 points): Allow Guybrush to die.
Turning the Lights Out (10 points): Complete the game by using object highlighting five times or less.
Helium Inhaler (10 points): Guybrush inhales some helium.
Call 9-1-1 (10 points): Call the LucasArts helpdesk when walking through the jungle on Dinky Island.