Suicide by elevator.

Assemble a Derelict car

Visit Calico for the first time

Hit 45 weakspots

Kill 10 enemies in a row using only Gauntlet after obtaining the Revolver

Cannonball enemies 50 times

Acquire 20 traits

Defeat the One True King

Defeat 25 Aberrations

Defeat Tal'Ratha

Defeat a Boss in Single-Player Without Taking Any Damage

Acquire 20 Melee Weapons