Level select
Start the game with the "-tedlevel [level number]" 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.
Infinite lives
Start the game with the "Level select" and "Difficulty select" command line parameters.
Infinite ammunition, invincibility, all keys
While playing a game, press M + L + S.
Full health, ammunition, keys, and chain gun
While playing a game, press L + I + M. Note: Your score will reset to zero after this cheat is enabled.
Commander Keen cheat message
While playing a game, press A + B + T.
Music test
At the memory screen that appears while the game loads, hold M. Then three music menu options will appear after the game finishes loading.
Cheat Codes
Start the game with the "-goobers" command line parameter. Then while playing a game, press [Left Shift] + [Alt] + [Backspace] to enable debug mode. Then, enter one of the following codes to activate the corresponding cheat function:
