Cheat mode:
During play, press Shift + ~ to bring up the console and enter devmapall. Now type in the following codes at the console:

Code                    Result
god                     God mode 
noclip                  No clipping mode 
notarget                Enemy AI disabled 
kill                    Kill yourself
freeze <#>              Freeze game for # seconds 
iknowkungfu             Martial Arts!   (press 1)
give all                All weapons, max stats 
give health             Full health 
give armor              Full armor 
give ammo               Full ammo 
give force              Full force bar 
give inventory          Full inventory 
give batteries          Full battery bar
give weapons            All weapons
quit                    Quit game
setforceall <1-4>       Set all force powers to level 1-4
setsaberall <1-10>      Set all saber abilities
sabercolor <1-2> X      Change saber color; 1-2 = top blade/bottom blade; for X enter color 
saber sith_sword        Sith saber
shaderlist              Show shaders
undying                 999 health
taunt                   Lightsaber taunt
thereisnospoon          Bullet-time

g_saberrealisticcombat <1-20>    Dismembering with lightsaber; 1 is mellow, 20 is intense
npc spawn {character}            Spawn Character using the list of names below 

alora
bespin_cop
bobafett
chewiecultist
chiss
cultist_grip
cultist_saber
cultist_saber_strong_throw
cultist_saber_strong_throw2
desann
galak
gran
howler
human_merc
human_merc2
imperial
jan
jedi
jeditrainer
jedi_random
kyle
luke
monmothma
morgan
noghri
player
prisoner
rax joris
reborn_dual
reborn_new
reborn_new2
reborn_staff
reelo
rodian
rosh_penin
shadowtrooper
snowtrooper
stormpilot
stormtrooper
swamptrooper
tavion
trandoshan
tuskenraider
ugnaught
weequay
ragnos
rancor
jawa

npc spawn {vehicle}            Spawn vehicle using the list of names below 

swoop
atst_vehicle
lambdashuttle
rancor_vehicle
swoop
swoop_cin
swoop_mp
swoop_mp2
swoop_red
tauntaun
template
tie-bomber
tie-bomber2
wampa_vehicle
wildtauntaun
x-wing
yt-1300
z-95

Thanks to Revolution readers Ethan, [JAS] Wade Vox, Kingers, The 27th Voice, mr weenie, Elfovich and Barrn!