Press "0" while hitting an opponent. (Note: IQ points will not be added, nor will boss characters be affected.)
The outcome of your fortune told by Sophia just before the game branches into the three paths depends on how you entered the theater in New York. If you talked your way in, Sophia will recommend the Team path. If you fought your way in, Sophia will recommend the Fists path. If you snuck in through the fire escape, Sophia will recommend the Wits path.
On the Team path, exchange the mask to Al-Jabbar for the baseball that was signed by Lou Gehrig. When it is in your inventory, look at it. Indy will state that the ball is actually signed by someone named Ron Gilbert. Ron Gilbert was the co-creator of the game engine used by the game: Script Command Utility for Maniac Mansion, or SCUMM.
In the inner circle of Atlantis, after leaving the canal through the bronze doorway, there two markings near the burrowing machine (one on the inside of the machine's housing, and one on the outside). Look at either one first, and Indy will say, "Atlantean Graffiti." This is a reference to George Lucas's 1950's nostalgia movie American Graffiti. Look at the other marking, and Indy will say "More Atlantean graffiti." This is a reference to American Graffiti's sequel, More American Graffiti. These markings are also hints on how to operate the machine.
The contents of the National Archaeology magazine you get at the beginning of the game are different between the German version of the game and all other versions. The German version of the game shows only one picture of Indy and Sophia together. All other versions of the game have two pictures, one of only Indy and the other only of Sophia. The one in the German version was an early design to be used in all versions but was scrapped at the last minute; the game was already shipped to Germany for translation before the change was made.
Free Sophia from her cell in Atlantis. Then, do not rescue her when she becomes possessed.
The background plate used for the Azores is based on a photograph of the Azores that appeared in an issue of National Geographic.
