: Commander Keen is by far the best Apogee ever created,
: and the best of the series is games 4-6.  Run, jump,
: shoot, pogostick, use tools, whatever, but have lots
: of fun playing Keen!  Highly rated.
 
keen, keys..... T-A-B     (Does not work in #6 - Aliens)
 
 -or-
 
Enter debug mode: A-2-Enter and type these while playing:
 
Code  = Action
------+--------------------------------------------
E-N-D = Stop game and save everyone (good ending)
F10-I = Free items
F10-B = Change color of border