Heretic Cheats

While playing a game, enter one of the following codes to activate the corresponding cheat function:
Result
Cheat Code
Invincibility quicken
All weapons and 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
Changes map mode ravmap (at map screen)
[F1] creates screenshot ravpic (at title screen)
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 and ammo idkfa

Type in the following codes during game-play to activate them
Invincibility: QUICKEN
Level Warp (## = Episode/level): ENGAGE##
All Weapons and Ammo: RAMBO
All Skeleton Keys: RAVSKEL
Turn into a Chicken: COCKADODDLEDOO

Changes the Map Mode (must be in map mode): RAVMAP

Walk through Walls: KITTY

Death Match Level: ENGAGE41

Full Health: PONCE

Toggles Power-Up Mode: SHAZAM
Kills All Monsters on the Level: MASSACRE

Toggle sound Debug information: NOISE

Toggles ticks-per-frame counter: TICKER
Instant Death: IDDQD

Get no Weapons or Ammo: IDKFA
Ring of Invulnerability: GIMMEA

Shadowsphere: GIMMEB

Quartz Flask: GIMMEC

Tome of Power: GIMMEE

Torch: GIMMEF

Time Bomb of the Ancients: GIMMEG

Morph Ovum: GIMMEH
Wings of Wrath: GIMMEI
Gives item that warps you to the beginning of the Level: GIMMEJ
Enter at game startup (to take pictures of the game at any time press F1): RAVPIC

If you are at low health (1-10), there is an easy way
to to boost your health by about 30. The lower the health, the
better. Pull out the Phoenix Rod and walk next to a wall. Blast
the wall, and if you are at low enough health and did the trick
correctly, your health will go up.

If you have all of the episodes(City of the damned,hells maw,Dome of D'spairl,Ossary,I forgot the 5th one),then type in engage 6-1,6-2 or 6-3(6-3 does not have an exit because it does not have any level after it). But these ones are hard. Be careful.