Commander Keen Episode III: Keen Must Die Hints & Cheats

To walk though uncompleted levels, hold tab with the num lock on and walk though the level. You will be able to walk though the level as you would if it were completed.

To access the Secret Island, you must wait at the shore just south of the Grand Intellect's Castle. Messie, the monster you may occasionally see swimming on the map will swim up to it. This may take several minutes. Walk onto Messie to hitch a ride and it will eventually take you to the Secret Island. The level here contains both hordes of Stuffed Toy VortiNinjas and the first of two complete translations to the Standard Galactic Alphabet in the entire Keen series.