Level select:
Start the game with the -tedlevel command line parameter. The level number is a two digit number with the tens digit representing the episode minus one and the ones digit representing the level number minus one.

Difficulty select:
Start the game with the -baby, -easy, -normal, or -hard command line parameters.

Unlimited lives:
Start the game with level select and difficulty select command line parameters.

Full health, ammunition, keys and chain gun:
Press L + I + M during game play. Note: Your score will reset to zero after this cheat is enabled.

Unlimited ammunition, invincibility, all keys:
Press M + L + S during game play.

Commander Keen cheat message:
Press A + B + T during game play.

Music test:
Hold M at the memory screen that appears while the game loads. Three music menu options will appear after the game finishes loading.

Cheat mode:
Start the game with the -goobers command line parameter. Press [Left Shift] + [Alt] + [Backspace] to enable debug mode. Enter one of the following codes to enable the corresponding cheat function.

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