Dead Commander Keen in Galaxy episodes can be kept permanently in game, including in Saved Game

[Sup_fanat]

Testes in episodes 4, 5 and 6 with similar engines
Turning on the cheat F10-N "No Clipping" standing on ground low border leads to Commander Keen falling to the bottom edge of level and dying. If there are walls where dead Commander Keen moves in No Clipping mode, then he can be forcibly moved on the top of the wall by turning off "No Clipping" cheat - then the dead Commander Keen will move as far right as he can - and if nothing else kills him once again and he cannot cross the right border and exit level, he will stay dead but not moving away and without the message "You didn't get past the level" appearing. Such a state remains if the game is saved and reloaded.

[SodiumtheGlitcher]

I had found this out at one point and was gonna use it for a level, but didn't. It's a funny thing. I believe if Keen dies at all and you hit F10-N, noclip will be turned off and Keen can slide around the level dead. It's because when Keen dies, the game automatically turns on noclip to make him fall out of the level.

[dark]

Interesting, I'd never tried this before.

If you are in Bloog Factory or another stage with the club guys who can stun you, getting stunned by the club snaps you out of this state, and after being in the stunned state, you can move around like normal again. BUT the camera is still locked to the borders of when you died, so you can't exactly play the level like normal after that... The level still exists outside of the boundaries of the camera though... blind playthroughs anyone???

[Sup_fanat]

One more thing - the dead sliding Keen generally moves to the right but Little Ampton can push him to the left. Discovered in test in level "Regulation Control Center" (6) in Keen 5.