4. Treavor Pendleton (Dishonored)
Now, Treavor may not be the most notable dude who betrays you in Dishonored but he is without a doubt the creepiest. A loyalist with the physique of a newt who sends you, not once, but twice to do his own dirty work. The first time is to kill his own brothers, who are admittedly dastardly to the point that they allegedly threw snakes into his crib when he was a child. However, theres also the side quest where Pendleton sends you to fight a duel in his honor because hes too much of a sniveling little coward to do it himself. And how does repay you? By being an irritable, passive aggressive pansy toward you. Oh, and that whole betrayal thing later on. But no worries. If you choose to do a High Chaos playthrough of Dishonored...lets just say that your final encounter with Pendleton is extremely satisfying, especially if you start humming The Drunken Whaler.