2. When Commodus announced plans for special Plebeian Games to celebrate his rebuilding of Rome, even his mistress agreed the Emperor had to die
At the end of 192, Commodus held the Plebeian Games. He himself took part, of course. By morning he fought and killed hundreds of animals, and in the afternoon he played at being a gladiator. The Emperor then announced his intention to hold a special day of games on 1 January 193, to represent the rebirth of the city under him. His mistress Marcia felt this was a step too far, so too did his chamberlain, a man called Electus. Most importantly of all, the head of the Praetorian Guard also concurred and joined in the conspiracy to kill Commodus.
At first, Marcia simply pleaded with Commodus to cancel his plans for the special games. He became enraged and threatened to have her killed. She struck first, however. She put poison in the cup of wine he always took before his bath. While he vomited this up, the conspirators still had a backup plan. When he made it to the bathroom, the Emperor’s own fitness coach, a wrestler called Narcissus, strangled him to death. So yes, Commodus died in his own bathroom, covered in vomit being strangled by a naked man.