Army of Two: The Devil's Cartel
In The 40th Day, you played as Tyson Rios and Elliot Salem, and when you got to the end you were forced to decide who lived and who died. So it was a bit of a surprise when in The Devil’s Cartel, you found out the man that tried to have you killed was none other than Elliot Salem himself. So not only was the betrayal deep due to your investment in him in the previous game, but he also turned on his own people and caused the deaths of countless innocents. He was such a bastard that by the time you face off with him, you are ready for him to die.