Here is the full list of all 12 Monkey Island 2 Special Edition: LeChuck's Revenge achievements.
Complete the game.
Beat the game without using one hint.
Beat the game using fewer than 10 hints.
Guybrush inhales some helium.
Call the LucasArts helpdesk when walking through the jungle on Dinky Island.
Allow Guybrush to die.
Complete Part Three: LeChuck's Fortress.
Complete Part Two: Four Map Pieces.
Complete Part One: Largo Embargo.
Switch to classic mode at least once.
Finish the game in under three hours.
Complete the game by using object highlighting five times or less.