David Scully is a video game voice actor. For the No One Lives Forever 2: A Spy in H.A.R.M.'s Way episode, he provided the voice of Isaac Barnes.
David has also provided voices for Aliens vs Predator 2 (Jones), Halo (Sergeant Johnson), TRON 2.0 (J.D. Thorne/Seth Crown), Halo 2 (Sergeant A.J. Johnson), F.E.A.R.: First Encounter Assault Recon (Douglas Holiday), SiN Episodes: Emergence (Viktor Radek), Halo 3 (Sergeant Avery J. Johnson), Left 4 Dead (Farmhouse Radio Voice) and more.