Bob O'Donnell is an actor and voice actor for video games.
He has worked on only a few films and video games, most notably voicing Dr. Kerr in the Bungie Studios video game Oni and the Drunken Dwarf in Myth. He also voiced a small part in Halo 2, speaking the single line by the Prophet of Objection in the opening cinematic of the game. In Halo: Reach, he is credited as the "Voice of the terminals", or Data pads.
- O'Donnell's part as the Prophet of Objection was not acknowledged in the Credits of the original release of Halo 2. This was rectified when Halo 2 Vista was released, finally recognizing O'Donnell for his part in the end credits.
- Bob O'Donnell is Marty O'Donnell's father, which may have been the reason for being hired.