Commander Keen 6 Easter Eggs

Go through the final level WITHIN THE MAIN MAP, not playing the level. You should arrive at a "balcony". If you go to the north end of it and wait. There should be a satellite on the top of the screen. Wait till it comes to the balcony and Keen will grab... more

Cheats

During the game type the following:
F10-B CHANGE BORDER COLOR
F10-D RECORD A DEMO
F10-I GET ALL ITEMS
F10-J JUMP CHEAT
F10-N CLIPPING ON/OFF
F10-G GOD MODE
F10-Y SEE ALL INVISIBLE/HIDDEN HOLES
F10-W WARP TO A LEVEL