Activate the following cheats by entering the corresponding codes:
CHEAT FUNCTION - CHEAT 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 Deathmatch level - engage41 Full health - ponce Toggle power-up mode - shazam Kill all monsters in level - massacre Chicken mode - cockadooledoo Sixteen of each inventory item in the game NOTE 1 - gimmez0 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
NOTE 1: Items will reduce to one of each instance after level completion. Wings of Wrath cannot be carried over to next level.
At the Cathedral (level 6), 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, and 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.
When having 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 near a wall. Blast the wall, and if you are at low enough health and did the trick correctly, your health will go up.