All Weapons & Ammo = rambo
All Weapons Taken from Player = IDKFA
Change Map Mode = ravmap
chaos device = gimmej
Chicken Mode = cockadoodledoo
Deathmatch Level = engage41
Full Health = ponce
Gives you five of everything = gimmez0
God Mode = quicken
Instant Death = IDDQD
Kill All Monsters in Level = massacre
Level Select = engage(episode number level number)
Morph Ovum = gimmeh
Mystic Urn = gimmed
Obtain all skeleton keys. = ravskel
Quartz Flask = gimmec
Ring of Invulnerability = gimmea
Shadowsphere = gimmeb
Sound Debug = noise
Time Bomb of the Ancients = gimmeg
Toggle Power-Up Mode = shazam
Tome of Power = gimmee
Torch = gimmef
View Ticks Per Frame = ticker
Walk Through Walls = kitty
wings of wrath = gimmei

= City of the Damned
E1M1: The Docks
E1M2: The Dungeons
E1M3: The Gatehouse
E1M4: The Guard Tower
E1M5: The Citadel
E1M6: The Cathedral (secret exit)
E1M7: The Crypts
E1M8: Hell's Maw (Iron Liches are bosses)
E1M9: The Graveyard (secret level)

= Hell's Maw
E2M1: The Crater
E2M2: The Lava Pits
E2M3: The River of Fire
E2M4: The Ice Grotto (secret exit)
E2M5: The Catacombs
E2M6: The Labyrinth
E2M7: The Great Hall
E2M8: The Portals of Chaos (Maulotaurs are bosses)
E2M9: The Glacier (secret level)

= Dome of D'Sparil
E3M1: The Storehouse
E3M2: The Cesspool
E3M3: The Confluence
E3M4: The Azure Fortress (secret exit)
E3M5: The Ophidian Lair
E3M6: The Halls of Fear
E3M7: The Chasm
E3M8: D'Sparil's Keep (D'Sparil is boss)
E3M9: The Aquifer (secret level)

= Ossuary
E4M1: Catafalque
E4M2: Blockhouse
E4M3: Ambulatory
E4M4: Sepulcher (secret exit)
E4M5: Great Stair
E4M6: Halls of the Apostate
E4M7: Ramparts of Perdition
E4M8: Shattered Bridge (Iron Liches are bosses)
E4M9: Mausoleum (secret level)

= Stagnant Demesne
E5M1: Ochre Cliffs
E5M2: Rapids
E5M3: Quay (secret exit)
E5M4: Courtyard
E5M5: Hydratyr
E5M6: Colonnade
E5M7: Foetid Manse
E5M8: Field of Judgement (Maulotaurs are bosses)
E5M9: Skein of D'Sparil (secret level)

= Fate's Path
E6M1: Raven's Lair
E6M2: The Water Shrine
E6M3: American's Legacy (No Exit)

NOTE: These are unused maps or intended for deathmatch. However, they are also suited for single player as well (they are fully stocked with monsters, weapons, ammo and artifacts).

1. Thou needeth a wet-nurse: Damage taken is halved; number of monsters is decreased; number of powerups and items is increased; ammo powerups give 50% more than normal. The game automatically uses quartz flasks and mystic urns to prevent the player from dying.

2. Yellowbellies-r-us: Number of monsters is decreased; number of powerups and items is increased. Otherwise similar to skill 3.

3. Bringest them oneth: This is the normal skill level.

4. Thou art a smite-meister: Similar to skill 3, but the number of monsters is greater; the number of items and powerups is decreased.

5. Black plague possesses thee: Similar to skill 4, but ammo powerups give 50% more than normal; monsters attack and move 300% faster; enemy missiles fly 300% faster; cheating is disabled.