Bring up the console with the ~ (tilde) key or the engine command
line with the TAB key and type:

Code                         Result 
CHEATPLEASE                  Enable Cheat Mode 
GOD                          God Mode 
GHOST                        No Clipping 
FLY                          Fly Mode 
WALK                         Ghost/Fly Mode Off 
SUMMON [ITEM]                Summon Item (See List Below) 
OPEN [MAPNAME]               Jump to Level [MAPNAME] 
SWITCHCOOPLEVEL [MAPNAME]    Jump to Level with Items Already Acquired 
BEHINDVIEW 0                 First Person View 
PLAYERSONLY                  Pauses All Non-Player Characters 
KILLPAWNS                    Kill All Enemies 
TOGGLEFULLSCREEN             Full-Screen Mode On/Off 
PREFERENCES                  Advanced Options 
STAT                         FPS Show FPS 


Summon Items: 

VikingShortSword
VikingBroadSword
VikingShield
VikingShieldCross
GoblinAxe
GoblinShield
DwarfBattleSword
DwarfBattleAxe
DwarfBattleHammer
DwarfWorkSword
DwarfWorkHammer
DwarfBattleShield
RuneOfPower
RuneOfPowerRefill
RuneOfHealth
RuneOfStrength
MagicShield
DarkShield
RustyMace
RomanSword
SigurdAxe
HandAxe
Torch 

     Map Names (use with OPEN and SWITCHCOOPLEVEL commands):

intro (intro movie)
ragnarvillage (begin movie)
ragnarvillage2
sailingship (level transition)
sinkingship
sinkingship2
deepunder1odin
deepunder1odinbv
deepunder3
deepunder4
hel1
hel1a
hel1a2
hel1b
hell2end
hel3a
hel3b
hellift
goblin1
goblin2
trialpit
beetlefly (level transition)
thorapproach
thor1
thormap3
thormap4a
thormap4b
thormap5a
thormap5b
thormap6loki
mountain1
mountain2
dwarftrans
dwarf1wwheel
dwarfmap2
dwarfmap3a
dwarfmap3b
dwarfmap5a
dwarfmap5b
dwarfmap6darkdwarf
loki1
loki1a
lokimaze
loki2
loki3a
loki3b
villageruin
asgard (end movie)