Bloodlust (skill tree)

 is Krieg's first skill tree, of three. The Bloodlust tree focuses on ranged combat. His other skill trees are Mania and Hellborn.

Tier 1

 * - Increases weapon swap speed
 * - Increases magazine size

Tier 2

 * - Kill skill. Killing an enemy increases melee damage and decreases grenade fuse time.
 * - Increases Assault Rifle damage during Fight for your Life.
 * - Increases damage reduction during Buzz Axe Rampage.

Tier 3

 * - Kill skill. Killing an enemy with a grenade or explosion increases weapon damage.
 * - When thrown, buzz axe now has dynamite attached to it.
 * - Kill Skill. Killing an enemy with a melee attack increases grenade damage.

Tier 4

 * - Increases the time before Bloodlust stacks start to decay.
 * - Increases the duration of Buzz Axe Rampage.

Tier 5

 * - Kill Skill. Killing an enemy increases reload speed.

Tier 6

 * - Killing an enemy causes them to explode with an elemental nova matching the element that killed it.