Codes

1. Debug Mode

   Start the game with the word <b>-goobers</b> in the command line. Press <b>[Left Shift] + [Alt] + [Backspace]</b> to enable debug mode. Then enter the cheat:

   Effect	Code
   Add VBLs	[Tab] + V
   Change Border Color	[Tab] + B
   Display Coordinates	[Tab] + F
   Display Number of Items, Doors, etc	[Tab] + C
   Extra Stuff	[Tab] + X
   Free Items	[Tab] + I
   God Mode	[Tab] + G
   Lose Health	[Tab] + H
   Memory Usage	[Tab] + M
   Quit	[Tab] + Q
   Skip to the Next Level	[Tab] + E
   Slow Motion	[Tab] + S
   View Graphics and Sound	[Tab] + T
   Warp to Level xx	[Tab] + W

2. Music test

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

3. Restore Full Health; Plus All Guns, Ammo, and Keys

   To enter this code anytime during gameplay, simply push the i, l, and m keys at the same time. However, doing so will reset your score back to zero.

4. Restore Sound

   Hold the keys B, A, and T at once. It should give you a message about Commander Keen, but if you cannot hear any sound (most of the time because of a crappy sound card) then the sound will be reset and you will be able to hear sound again.

Secrets

1. Episode 1 secret floor

   In first floor in room where floor 2 elevator is turn right and search the wall to find hidden room. Search walls until you find elevator to floor 10