Item

Doom
The items flagged with an asterisk (*) count toward the ITEMS percentage displayed at the end of each level.

Health

 * Health potion*
 * Stimpack
 * Medikit
 * Soul sphere*
 * Berserk pack*

Armor

 * Spiritual armor*
 * Security armor (Green armor)
 * Combat armor (Blue armor)

Powerups

 * Radiation suit
 * Berserk pack*
 * Backpack
 * Computer map*
 * Light amplification visor*
 * Blur artifact* (partial invisibility sphere)
 * Invulnerability artifact*

Keys

 * Blue Keycard (Doom)
 * Red Keycard (Doom)
 * Yellow Keycard (Doom)
 * Blue Skullkey (Doom)
 * Red Skullkey (Doom)
 * Yellow Skullkey (Doom)

Doom 2/Final Doom
Doom 2/Final Doom had all of Doom's items with the addition of the health and armor powerup, the
 * Megasphere*

Health

 * Crystal Vial

Armor

 * Enchanted Shield
 * Silver Shield

Artifacts

 * Chaos Device
 * Map Scroll
 * Morph Ovum
 * Mystic Urn
 * Quartz Flask
 * Ring of Invulnerability
 * Shadowsphere
 * Time Bomb Of The Ancients
 * Tome Of Power
 * Torch
 * Wings Of Wrath

Keys

 * Blue Key (Heretic)
 * Green Key (Heretic)
 * Yellow Key (Heretic)

Health

 * Crystal Vial

Armor

 * Amulet Of Warding
 * Falcon Shield
 * Mesh Armor
 * Platinum Helm

Artifacts

 * Banishment Device
 * Boots Of Speed
 * Chaos Device
 * Krater Of Might
 * Dark Servant
 * Disc Of Repulsion
 * Dragonskin Bracers
 * Flechette
 * Icon Of The Defender
 * Mystic Ambit Incant
 * Mystic Urn
 * Porkalator
 * Quartz Flask
 * Torch
 * Wings Of Wrath

Puzzle items

 * Clock Gear (Bronze And Steel)
 * Clock Gear (Bronze)
 * Clock Gear (Steel And Bronze)
 * Clock Gear (Steel)
 * Daemon Codex
 * Emerald Planet 1
 * Emeral Planet 2
 * Heart Of D'Sparil
 * Liber Obscura
 * Pedestal Of D'Sparil
 * Ruby Planet
 * Sapphire Planet 1
 * Sapphire Planet 2
 * Yorick's Skull
 * Yorick's Statue

Mana

 * Blue Mana
 * Combine Mana
 * Green Mana

Keys

 * Axe Key
 * Castle Key
 * Cave Key
 * Dungeon Key
 * Emerald Key
 * Fire Key
 * Horn Key
 * Rusty Key
 * Silver Key
 * Steel Key
 * Swamp Key

Health

 * Med Patch
 * Medikit
 * Surgery Kit

Armor

 * Leather Armor

Powerups

 * Environmental Suit
 * Map
 * Scanner/Map-Radar
 * Shadow Armor
 * Targeter

Quest things

 * 10 Gold
 * 25 Gold
 * 50 Gold
 * Broken Power Coupling
 * Communicator
 * Computer
 * Gates (Piston)
 * Gold Coin
 * Guard Uniform
 * Offering Chalice
 * Officer Uniform
 * Power Coupling

Keys

 * Base Key (Front)
 * Blue Crystal Key
 * Blue ID Card
 * Brass Key
 * Chapel Key
 * Core Key
 * Factory Key
 * Gold ID Badge
 * Gold Key
 * Mauler Key
 * Mine Key
 * Oracle Key
 * Order Key
 * Red Crystal Key
 * Severed Hand
 * Silver Key
 * Travel Passcard
 * Warehouse Key