An armor can be found on the pedestal in E1M1: Hangar.

The standard armor (known as security armor in the manuals) is an item that appears in the Doom games as a bright green military vest, similar to the one worn by the player sprite. When collected, it increases the player's armor percentage to 100. It cannot be collected if the player already has at least 100 percent armor. When an armor is obtained, the game displays the message: Picked up the armor., an unusual format compared to the rest of the non-weapon pickups.

The armor will absorb one third (1/3) of all damage received, rounded down, until it is fully depleted.

This item is not counted in the items percentage displayed at the end of each level.

Armor data
Thing type2018 (decimal), 7E2 (hex)
Appears inShareware Doom
Registered Doom
Ultimate Doom
Doom II/Final Doom

Appearance statistics

The IWADs contain the following numbers of armors per skill level:

The Ultimate Doom464543
Doom II: Hell on Earth272728
TNT: Evilution444647
The Plutonia Experiment181817

Doom RPG

In Doom RPG, the armor is called a flak jacket. It increases the player's armor rating by 25 units.

Items from Doom and Doom II
Health Health bonusStimpackMedikit
Armor Armor bonusArmorMegaarmor
Powerups BerserkComputer area mapInvulnerabilityLight amplification visorMegaspherePartial invisibilityRadiation shielding suitSupercharge
Keys Keycard • Skull key
Weapons FistChainsawPistolShotgunSuper shotgunChaingunRocket launcherPlasma gunBFG9000
Ammo BackpackClip4 shotgun shellsRocketEnergy cellBox of bulletsBox of shellsBox of rocketsEnergy cell pack