Bullet Lifesteal

This article is about the stat. For the item, see Bullet Lifesteal (item).

Bullet Lifesteal is a stat that causes a percentage of bullet damage dealt to be regained as health.

Math

Despite being presented in-game as +X% Bullet Lifesteal, different sources of bullet lifesteal stack multiplicatively, not additively. With $n$ different sources of bullet lifesteal, final bullet lifesteal $B{L}_F$ is given by:

$B{L}_F=1-\prod _{i=1}^n(1-B{L}_i)$

where $B{L}_i$ is the bullet lifesteal provided by the $i$th source.

Example

With 10% Bullet Lifesteal from Crippling Headshot and 35% Bullet Lifesteal from Leech, final bullet lifesteal is:

$B{L}_F=1-(1-0.10)\times (1-0.35)=41.5\mathrm{\%}$

Note that the in-game user interface is inconsistent in how it rounds the final number.

Sources

List of items

Name	Cost	Category	Stat change
Active Reload	1,250	Weapon	+18% Bullet Lifesteal
Heroic Aura	3,000	Weapon	+16% Bullet Lifesteal
Crippling Headshot	6,000	Weapon	+10% Bullet Lifesteal
Vampiric Burst	6,000	Weapon	+80% Bullet Lifesteal
Bullet Lifesteal	1,250	Vitality	+24% Bullet Lifesteal
Leech	7,250	Vitality	+32% Bullet Lifesteal