Indiana Jones And The Emperor's Tomb

Cheat mode:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "default.cfg" file in the "\lucasarts\indiana jones and the emperor's tomb\gamedata\indy" folder. Add the following line to the existing content of the file:

cheats:1

This unlocks unlimited air when swimming, unlimited ammunition, and unlimited health. These options do no seem to be individually selectable.
Information in this section was contributed by BeLGaRaTh.

To unlock more cheat effects, add the following lines to the file. You will get a few more weapons including a Panzerschreck, Luger, Mauser, spear gun, crossbow, Tommy gun, MP-40 SMG and the art galley.
Information in this section was contributed by Nate The Great.

cheats:1
cheats:12

To get just a Panzerschreck weapon, add the following line to the file:
Information in this section was contributed by Nate The Great.

cheats:2

To get all weapons, but not the art gallery, add the following line to the file:

cheats:3

To get the Pa Cheng (throwable weapon) at the beginning of the game, add the following line to the file:
Information in this section was contributed by Zach Kucala.

cheats:5

To be invincible and have all weapons, add the following lines to the file:
Information in this section was contributed by The Godfather.

cheats:1
cheats:13

To continue from the beginning of the level after Indy dies, without the whole reload process, add the following line to the file:
Information in this section was contributed by JaneB.

cheats:100

Disable AI:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "vars.cfg" file in the "\lucasarts\indiana jones and the emperor's tomb" folder. Locate the "aiDisabled" line and change it to "aiDisabled=true".
Information in this section was contributed by Nate The Great.

Bonus levels:
Enter the game director and enter the folder that contains its levels. Run the "ropetest" and "whipgym" files to play those levels, which are not found in other versions of the game.

Art gallery:
Collect all artifacts in the game to unlock an art gallery.

Hint: Secret area:
On the first level when you first encounter crocodiles, kill all of them with your machete. Then, swim to the left next to the entrance to the temple. Swim behind the waterfall to pull up on a small ledge. You will not be able to see much, there is a box here. Break it open to get a bundle of dynamite.
Information in this section was contributed by darlenemarie.

Console commands:
There apparently is a console that can be unlocked in the game to activate additional cheats. LucasArts has included the following text in their readme.txt file: "The Emperor's Tomb console commands are primarily used for development, testing, and product support purposes. Users unfamiliar with these console commands should not attempt to use them, as their use may result in game crashes, corrupted graphics, and/or a variety of other issues. Console commands and errors resulting from the use of console commands and/or cheats are unsupported."
Please submit any information regarding this feature.
Information in this section was contributed by Nate The Great.

Hint: Secret area:
On the first level when you first encounter crocodiles, kill all of them with your machete. Then, swim to the left next to the entrance to the temple. Swim behind the waterfall to pull up on a small ledge. You will not be able to see much, there is a box here. Break it open to get a bundle of dynamite.
Information in this section was contributed by darlenemarie.