Psychos are everywhere in the Borderlands, but what makes them so uniformly deranged? Patricia Tannis theorizes they've been driven insane by the knowledge of a place she's dubbed "Vaulthalla." The key to uncovering this location lies with the most badass psycho of them all: Krieg, an unlikely ally who swings his buzz-axe on behalf of the Crimson Raiders. The only way to learn the true nature of Vaulthalla is to climb inside Krieg's chaotic mind and seek it out. This content requires Borderlands 3 to play and is included in the Season Pass.