To use these codes, simply hit the TAB key, type in the code of your choice, and press ENTER.

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.
For example: 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 - Third-person style view.

BEHINDVIEW 0 - Resets above.

FLUSH - Clean up textures

KILLPAWNS - Kill all monsters

SLOMO# - Set game speed (#1-10)

KILLALL - Kill all of indicated enemy type

INVISIBLE - Invisibilty

INVISIBLE0 - Invisibility off