Type these during the game:

FLAMENSTEIN
All fire weapons and ammo

TITANIII
Missile launcher and missiles

EXPLODARAMA
All explosive weapons and ammo

CARRYMORE
Backpack

LOBITFAR
Grenades and petrol bombs

CROTCHBOMB
Mines

FIREHURLER
Flame-thrower and fuel canisters

HEALTHFUL
Full health

THICKSKIN
Full armour

GIMMEDAT
Get everything
HESSTILLGOOD
Resurrection (when dead)

DAWHOLEENCHILADA
Grenades, missiles, napalm, flamer

BREAKYOSAK
Shotgun ammo

SHELLFEST
Spray cannon

SHOTGUN
Shotgun ammo

THEBESTGUN
Spray cannon

STERNOMAT
Napalm

THERESNOPLACELIKEOZ
Skip level

IAMSOLAME
Invulnerability