Heretic Codes -

Cheat Mode
Type one of the following codes during game play to activate the corresponding cheat function.

Effect	Code
Changes map mode	ravmap (at map screen)
[F1] creates screenshot	ravpic (at title screen)
Invincibility	quicken
All weapons, ammo	rambo
All skeleton keys	ravskel
Walk through walls	kitty
Level select	engage<episode number><level number>
Deathmatch level	engage41
Full health	ponce
Toggle power-up mode	shazam
Killl all monsters in level	massacre
Chicken mode	cockadooledoo
Ring of Invulnerability	gimmea
Shadowsphere	gimmeb
Quartz Flask	gimmec
Mystic Urn	gimmed
Tome of Power	gimmee
Torch	gimmef
Time Bomb of the Ancients	gimmeg
Morph Ovum	gimmeh
Wings of Wrath	gimmei
Chaos device	gimmej
Sound debug	noise
Ticks-per-frame counter	ticker
Instant death	iddqd
No weapons, ammo	idkfa

Secret Grave Yard level:
Go to the Cathedral (level 6) and flip the end switch. Do not complete the level. Instead, go back up the green key stairs and turn right. Go down the hall until you see an opening in the wall that was not there before. Enter it, kill the enemies, flip the switch to open another door down there. Go on the right "end" teleport to complete the level and travel to the Grave Yard.