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.
Start the game with the "-baby", "-easy", "-normal", or "-hard" command line parameters.
Start the game with the "Level select" and "Difficulty select" command line parameters.
While playing the game, press M + L + S.
While playing the game, press L + I + M. Note: Your score will reset to zero after this cheat is enabled.
While playing the game, press A + B + T.
At the memory screen that appears while the game loads, hold M. Then three music menu options will appear after the game finishes loading.
Start the game with the "-goobers" command line parameter. Then while playing the game, press [Left Shift] + [Alt] + [Backspace] to enable debug mode. Then, enter one of the following codes to activate the corresponding cheat function:
|Change border color||[Tab] + B|
|Display number of items, doors, and actors||[Tab] + C|
|Skip two levels||[Tab] + E|
|Displays coordinates||[Tab] + F|
|Toggle God mode||[Tab] + G|
|Lose health||[Tab] + H|
|Free items||[Tab] + I|
|Display memory usage||[Tab] + M|
|Pause without message||[Tab] + P|
|Exit game||[Tab] + Q|
|Toggle slow motion||[Tab] + S|
|View graphics and play sounds||[Tab] + T|
|Add extra VBLs||[Tab] + V|
|Level select||[Tab] + W|
|Extra stuff||[Tab] + X|