- Sam And Max series reference
Play the game in Classic Style mode, and go to the monkey head entrance. You can see Sam and Max idols.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

5 Points
Old School	Experienced the original, classic adventure game, as it was in the early 90s.
10 Points
Escape Artist	Escaped from the monkey island cannibals hut 5 times.
Marooned Everyone	Re-marooned Herman Toothrot and marooned Carla, Otis and Meathook on Monkey Island.
Determined	Finishd the game without using any hints.
Ten Minutes Later...	Guybrush can keep pushed his breath for 10 minutes, but not any longer than that.
RecordKeeper	Acquireed all of the notes and memos sent between Herman Toothrot, LeChuck and the Cannibals.
Human Cannonball	Finished the entire game in record time. We hope you were wearing a helmet!
15 Points
Sharp Tongue	Guybrush learned all of the insults, and is the wittiest/deadliest pirate what ever swung a sword.
25 Points
The Three Trials	Finishd Part One
The Journey	Finish Part Two
Under Monkey Island	Finishd Part Three
45 Points
Guybrush Kicks Butt	Finishd Last Part

- Grim Fandango reference
In Le Chuck's lair, look closely at the pillars made from skulls. One of the faces is that of Manny Calavera's head.

- Maniac Mansion 2 reference
Play the game in Special Style mode, and go to the monkey head entrance. You can see a Purple Tentacle idol.