I have used these codes myself, and they should work

DOOM CODES

IDDQD=TOGGLES THE GOD MODE ON/OFF
IDKFA=GIVES YOU ALL THE WEAPONS, AMMO AND 200% ARMOR
IDBEHOLD+FOLLWING
S-GET BESERK STRENGTH
V-TEMPORARY INVULNERABILITY
I-TEMPORARY INVISIBILITY
A-GET FULL AUTOMAP
R-GET ANTI-RADIATION SUIT
L-LIGHT AMPLIFICATION VISOR
IDSPISPOPD=TOGGLES THE CLIPPING MODE
IDCHOPPERS=GET CHAINSAW AND A MESSAGE
IDCLEV=(EPISODE#)(MAP#)-LEVEL WARP
IDDT=TOGGLES NORMAL MAP,FULL MAP,FULL MAP+OBJECTS
IDMYPOS=DISPLAYS COORDINATES AND HEADING


DOOM2 CODES

THE DOOM2 CODES ARE THE SAME AS DOOM WITH THE FOLLOWING EXCEPTIONS:
IDCLIP=TOGGLES THE CLIPPING MODE
IDMUS=(MAP#)-PLAYS MUSIC FROM SELECTED LEVEL


WOLFENSTEN 3D CODES

AT THE DOS PROMPT,TYPE WOLF3D-GOOBERS TO ENABLE DEBUGGING
MODE.WHILE IN THE GAME,PRESS SHIFT,ALT, AND BACKSPACE KEYS
SIMULTANEOUSLY.PRESS TAB AND ANYOF THE FOLLOWING KEYS
SIMULTANEOUSLY:
G=GOD MODE
I=EXTRA ITEMS
X=EXTRA STUFF
S=SLOW MOTION
B=CHANGE BORDER COLOR
V=ASKS HOW MANY EXTRA VBL'S
W=LEVEL WARP(1-10)(10 IS A SECRET LEVEL)
Q=BOMBS COMPUTER
P=PAUSE-WITHOUT THE "PAUSE"WINDOW
O=SHOWS MAP OF THE CURRENT LEVEL(CONFUSING)


TEKWAR CODES

*NUMLOCK=INVULNERABILITY
*NOENEMIES=REMOVES EVERYONE BUT YOU
*NOGUARD=REMOVES THE GUARDS FROM THE GAME
*NOCHASE=REMOVES THE SHOOTING ENEMIES FROM THE GAME
*NOSTROLL=REMOVES THE INNOCENT BY STANDERS FROM THE GAME


WARCRAFT 1 CODES

TO ENTER CODES HIT ENTER AND START TYPING
CHEAT CODES
POT OF GOLD =10,000 GOLD AND ? LUMBER
SALLY SHEARS=SHOWS ENTIRE MAP
IRON FORGE=UPGRADES WEAPONS AND SHIELDS
HURRY UP GUYS=BUILDS FASTER
EYE OF NEWT=UPGRADES ALL MAGIC


WARCRAFT 2 CODES

TO ENTER CODES HIT ENTER AND START TYPING
CHEAT CODES
GLITTERING PRIZES=1OOOO GOLD,5OOO LUMBER,5OOO OIL!!!!!
DECK ME OUT=UPGRADE EVERYTHING
EVERY LITTLE THING SHE DOES=UPGRADE MAGE ALL THE WAY
IT IS A GOOD DAY TO DIE=GOD MODE
MAKE IT SO=FAST BUILD
ON SCREEN=UNCOVERS MAP
HATCHET=2 CHOPS TO HARVEST LUMBER
NETPROF=LASER SHOW
UCLA=DISPLAYS"GO BRUINS"ON SCREEN
DAY=DISPLAYS"FIEF"ON SCREEN


Duke Nukem 3D

DNMAJOR=UNLIMITED JETPACK
DNCORNHOLIO=GOD MODE ON/OFF
DNKROZ=GOD MODE ON/OFF
DNSTUFF=ALL WEAPONS AND ITEMS
DNMONSTERS=MONSTERS DISAPPEAR
DNHYPER=STEROIDS
DNCLIP=CLIPPING MODE ON/OFF


TA: KINGDOMS

PRESS ENTER THEN TYPE + BEFORE ENTERING CODE
ATM=REFILL MANA
NOWISEE=REVEAL MAP
LOGO (1-8)=CHANGE UNITS COLOR


TZAR

TO ENTER CODES HIT ENTER AND START TYPING
HMPRETTYPLEASEWITHSUGARONTOP=ENABLES CHEAT MODE
HMPETLEVA=+50,000 TO ALL RESOURCES
HMREVEAL=FULL MAP
HMNOTECH=ALL BUILDINGS AND UNITS AVAILABLE
HMSPAWN <UNITS NAME>=SPAWN INDICATED UNIT

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