Roy Conrad was never a voice over for any video games.
Roy Conrad (November 11, 1940  January 19, 2002) was an American actor, best known for his role as the voice actor of Ben in the 1995 LucasArts computer game Full Throttle. A PC game, also known as a computer game or personal computer game, is a type of video game played on a personal computer rather than a video game console or arcade machine. 
Conrad provided the voice of Ben in the LucasArts computer game Full Throttle. He has also appeared in another LucasArts game, Star Wars: Rebel Assault II: The Hidden Empire, as the rebel pilot Ace Merrick. A PC game, also known as a computer game or personal computer game, is a type of video game played on a personal computer rather than a video game console or arcade machine. 
