During play, press Backspace to bring up the chat window. Now enter the following

codes:

give me life  		Full health (can only be done 5 times)
heal it up  		Full health
i like to cheat  	All weapons and ammo 
iamqueen  		Play as Queen Amidala
iamquigon  		Play as Qui-Gon Jin
iampanaka  		Play as Panaka
iamobi  		Play as Obi-Wan 
perfection		Auto-fire/attack  
naughty naughty  	First person view
beyond cinema  		Letterbox 
from above 		Overhead view 
perf  			Wire frame mode
rex 			Wire frame menu         
fps			View frame rate  
60fps			60 fps frame rate              
slowmo			Slow motion mode            
gurshick  		View credits                              
drop a beat		Moving walls               
i stink  		Easier difficulty
i really stink		Easier difficulty
i rule the world	Hard difficulty
donttttt		Suicide          
rrrrright		Suicide    
kill me now  		Suicide
but i feel so good 	Force push power color changed to red
happy			Weapon 3 more powerful                   
turntables		Disable all cheats 
brenando		"Tech Bonus!" message 
oldcode			Debug mode. Enter again for second debug menu.                

Thanks to Revolution readers zumzum, John Brothers II, Hagen Miller, Spartacus

M., Sabin Rene Figaro, and FB Slim800!