Krieg

Krieg is the playable Psycho class character in Borderlands 2. He was revealed on March 24, 2013, in the Borderlands 2 Krieg the Psycho Character Reveal Trailer.

Background
Not much is known about Krieg, other than he has escaped from a lab beneath Pandora.

Action Skill: Buzz Axe Rampage
[Fire] to swing buzz axe, [Aim] + [Fire] to throw buzz axe.

+500% Melee Damage, regain all Health on kill.

Duration: ~15 seconds.

Cooldown: 120 seconds, reduced by taking damage.

Bloodlust
Focuses on ranged combat using a Bloodlust stack mechanic.

Mania
Focuses on melee combat and Health/Fight For Your Life mechanics.

Hellborn
Focuses on elemental effects, particularly setting oneself on fire.

Quotes
When using Buzz Axe Rampage Killing an enemy while using Buzz Axe Rampage When activating Light the Fuse When detonating during Light the Fuse On earning a Second Wind
 * START SCREAMING!
 * [unintelligible roaring noises]
 * Boom!
 * Wahahahah! I'll take you ALL with me!
 * Wahahahah! Not fast enough!
 * Immortal!

Trivia

 * Krieg's skill Strip The Flesh is a reference to a phrase commonly heard from psychos ("strip the flesh, salt the wound").