Commander Keen: 4, 5, 6, and Dreams Codes -

Items:
Press B + A + T to receive an extra life, 99 rounds of ammunition, and all four diamond keys for a level. This has no effect in Commander Keen: Dreams.

Cheat mode:
Press A + 2 + [Enter] during game play to enable cheat mode in Commander Keen 4 or 5. Press [F10] and one of the following keys to activate the corresponding cheat function. Note: You will lose a life if you leave the level with the "No clipping" code enabled. Activate the "Record demo" code again to save the demo.

Effect	Key
God mode	G
Level select	W
Flying jump	J
No clipping1	N
99 ammo, 3000 points	I
Sprite test1	T
Record demo1	D
Add 0-8 VLBs1	V
Display memory usage1	M
Level skip1	E
Slow motion mode	S
Show hidden areas1	Y
Set border color 1-151	B
Show active and inactive object numbers in level1	C

Glitch: Fly in Commander Keen 6:
Find a spot where you want to go up, and jump. While in midair, shoot down as you are falling. . If done correctly, Keen will be standing about a one shot width off the ground. Just look up and shoot. You will take off straight up at the speed of your shot. Note: Some practice is required to get the correct timing.