Edit the shortcut to the game so it reads the following:
"C:LOCATION OF GAME\mohaa.exe" +set ui_console 1 +set cheats 1 +set thereisnomonkey 1

When in the game press ~ to display the console window. Put in one of the following cheats.
Invincibility - WINCHESTER
Gives player all weapons - wuss
God Mode - dog
Heal player - fullheald
notarget - Removes target
give ammo - Max Ammo
noclip - No clipping
listinventory - List of the player's inventory
tele x y z - Teleport to location
coord - Prints out current location and angles
health - set current health
kill - Kills the player
giveweapon weapons/"weapon_name".tik - Gives the player the specified weapon

Weapon names:

Colt 45 - colt45
Frag Grenade - m2frag_grenade
Walther P38 - p38
Steilhandgranate - steilhandgranate
M1 Garand - m1_garand
Mauser KAR 98K - kar98
Shotgun - shotgun
Bazooka - bazooka
Panzerschreck - panzerschreck
BAR - bar
StG 44 - mp44
Thompson - thompsonsmg
MP40 - mp40
Springfield '03 Sniper - springfield
KAR98 Sniper - kar98sniper
Info submitted by XAnimal on Tuesday, January 15, 2002 at 09:02:42
Map Lists

Type maplist to bring up a list of levels.
map - go to map
m1l1
m1l2a
m1l2b
m1l3a
m1l3b
m1l3c
m2l1
m2l2a
m2l2b
m2l2c
m2l3
m3l1a
m3l1b
m6l3e