Effect                 Code
God mode                cheat god 
Heal                    cheat full
Restore HP              cheat eat 
Kill target             cheat kill 
Hurt shark              hurtswampschark 
Harpie                  harpie
Lurker                  lurker
Artifact for quest      lichtbringer 
Spawn indicated item    insert  
Toggle all cheats       autocomplement 
Load position           load position 
Load game               load game 
Save Game               save
Screenshot              print
Display game version    version 
Teleport to waypoint    goto waypoint 
Teleport to the castle  goto pos 
Teleport                goto vob 

torlofsaxt
roter_wind
ulumulu
artos_schwert
silax_axt
diegos_bogen
thorus_schwert
udshaman_rockefeller
icegolem
freemineorc
meatbug
bridgegolem
troll
youngtroll
yscavenger
ymolerat
xardasdemon
swampshark
btestmodell
ctestmodell
dtestmodell
ftestmodell
gtestmodell
htestmodell
jtestmodell
ababetestmodell
perception_testmodell)
atestmodell
urizielrune
xp_map
neks_amulett
cords_spalter
prankenhieb
namibskeule
dmb_armor_m
elementare_arcanei
astronomie
dungeonkey
fakescroll
zeitenklinge
victim
self  

Thanks to Revolution reader Tom T. Chen!