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The Secret of Monkey Island (DOS, Mac OS Classic)

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Title Screen

The Secret of Monkey Island

Developer: Lucasfilm Games
Publisher: Lucasfilm Games
Platform: DOS
Released in US: October 1990 (DOS), April 1992 (Mac OS Classic)
Released in EU: 1990 (DOS)
Released in AU: 1990 (DOS)

MusicIcon.png This game has unused music.
DebugIcon.png This game has debugging material.
LevelSelectIcon.png This game has a hidden level select.
Carts.png This game has revisional differences.

The Secret of Monkey Island is a 1990 point-and-click graphic adventure game and the first in the Monkey Island series.

To do:
  • There's unused text, as shown here, which is presumably in one of the versions of the game.
  • This features stuff found in the source code that may exist in the final game too, prerelease content, and mentions a possibly pre-final demo on "the rare Passport to Adventure demo disk". In addition, some comments in the Twitter thread for this article mentions some odd undocumented versions.
  • There is more than one floppy disk version of the game.
  • What are the differences between the Roland MT-32 and the CD audio soundtracks?

Debug Mode

After booting up the game, enter hardyharhar on the keyboard. Then, press Ctrl, Shift and D together. At any time Guybrush is on the screen, press Ctrl and G to go to any room in the game and set the x position for Guybrush to be in that room. Note that this feature is very error-prone, due to the lack of checking where the player is going, so use it carefully.

CD Version Keys

In addition to going to any room in the game, the following keys are available in the CD version:

Key(s) Action
Ctrl + E Examine/Change a SCUMM variable
Ctrl + F Fast mode
Ctrl + O Pick up an object
Ctrl + L Enter in a boot parameter
1 Change character
7, 8 Change text color

The SCUMM Bar has a list of valid rooms and boot parameters. Note that an invalid input is likely to crash the game.

(Source: Endy/Ender, bgbennyboy)

Unused Music

There exists a short audio track in the CD version which doesn't seem to be used anywhere.


A SCUMM interpreter version string appears at 0x868 in the Mac version's DATA resource:

5.2.02 (Mar 16 1992 22:15:04)

Revisional Differences

To do:
Look for more differences.

Not counting the Special Edition, there are three versions:

  • 16 color floppy disk version, released in October 1990
  • 256 color floppy disk version, released in December 1990
  • CD-ROM, released in 1992

Audio Differences

The CD version improved all of the audio and added new ambient tracks.

Floppy Disk CD-ROM
Chapter Fanfare
Scumm Bar

Visual Differences

The HUD was completely redone for the CD version. The commands Walk to, Turn on and Turn off have been removed and items now show up as graphical icons instead of text.

Brightness on certain characters has been tweaked: Guybrush is brighter in the CD version, and certain objects and other characters have been either brightened or darkened. Note in the screenshots below that the puddle of Grog on the floor is purple in the Floppy Disk version, but green in the CD version.

Floppy Disk CD-ROM
Monkey1 Floppy HUD.png Monkey1 CD HUD.png

Dialogue options have been moved one pixel to the right to avoid clipping the left side of the screen. The width of the space character has also been reduced.

Floppy Disk CD-ROM
Monkey1 Floppy DialogueOptions.png Monkey1 CD DialogueOptions.png

Stump Easter Egg

In the Floppy Disk version, when you "look at" a particular stump in the forest, Guybrush would exclaim there is a hole in the stump leading to a system of catacombs. The game would then jokingly prompt you to insert Disk 22, 36, 114 or other numbers. This led to players calling LucasArts' support hotline so much they decided to remove the joke in later versions of the game.

Miscellaneous Differences

  • The CD version runs slightly faster and has faster loading times.
  • In the circus, when asked for a helmet, you can use the pot or give the pot to the Fettucini Brothers in the Floppy Disk version. But in the CD version, you cannot use it so you have to give it.
  • When looking at the treasure map, there is a unique animation of Guybrush taking out the map on the CD version.