Martinet provided voiceover acting for the boxers and the announcer in the Super NES title "Super Punch-Out!!". He voiced the character Vigoro in Sega's Dreamcastand Nintendo GameCube role-playing video game, "Skies of Arcadia". He did the voice of Homunculus in the Konami PlayStation 2, Xbox and Windows game "Shadow of Destiny", and provided voices for "Reader Rabbit" and "The ClueFinders" games.