Armor

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 (⅓) 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 type	2018 (decimal), 7E2 (hex)
Appears in	Shareware Doom Registered Doom Ultimate Doom Doom II/Final Doom
Radius	20
Sprite	ARM1
Class	Item Pickup

Appearance statistics

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

Game	1-2	3	4-5
Doom	40	39	38
The Ultimate Doom	46	45	43
Doom II: Hell on Earth	27	27	28
TNT: Evilution	44	46	47
The Plutonia Experiment	18	18	17

Doom RPG

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

Doom Items Health Health bonus Stimpack Medikit Armor Armor bonus Armor Megaarmor Weapons Fist Chainsaw Pistol Shotgun Chaingun Rocket launcher Plasma gun BFG9000 Added in Doom II Super shotgun Ammo Backpack Clip 4 shotgun shells Rocket Energy cell Box of bullets Box of shells Box of rockets Energy cell pack Items Key Powerups Berserk Computer area map Invulnerability Light amplification visor Partial invisibility Radiation shielding suit Soul sphere Added in Doom II Megasphere