Armor bonus

An armor bonus (or spiritual armor) is a powerup that appears as a gray helmet with a green glow from within. Picking one up increases the player's armor by 1% up to a maximum of 200%; or, in versions of Doom prior to v1.2, an arbitrarily large number.

Green security armor and blue combat armor provide different levels of protection, respectively one-third and one-half of damage. An armor bonus does not, however, interfere with the quality of armor protection, only the quantity, incrementing the value by one.

Appearance statistics
The IWADs contain the following numbers of armor bonuses: