Unreal Cheats
Enter these into the unreal console (console brought up by ~ key):
ALLAMMO
Gives you 999 ammo for all of your guns.
FLY
Lets you fly around.
GHOST
Lets you walk through walls.
WALK
Returns you to walking mode if you are flying or ghosting.
GOD
Makes you invulnerable to all attacks.
SUMMON
Lets you add a weapon or an item to the world.
SUMMON EIGHTBALL
SUMMON FLAKCANNON
SUMMON NALI
SUMMON SKAARJWARRIOR
PLAYERSONLY
Freezes time. Press again to resume time passage.
OPEN MAPNAME
Jump to any map, just enter the name like OPEN DIG.
BEHINDVIEW 1
Puts you in Tomb Raider style view.
BEHINDVIEW 0
Resets this.
FLUSH
If you start getting weird garbage graphics on wall textures or creatures, type this to fix it.