He acted in some movies, especially TV-movies, until he began working as voice character for LucasArts videogames, beginning with secondary roles on Indiana Jones and the Fate of Atlantis (1992) and Sam and Max Hit the Road (1993). In this same year, he got some recognition with Day of the Tentacle, where he voiced one of the playing characters (Hoagie), plus all the main tentacles (Evil Purple Tentacle, good Green Tentacle and futuristic Doctor Tentacle).
Delk played a police sergeant in the George Lucas films More American Graffiti and Howard the Duck. While acting in different movie productions during 1994, Delk still had time to do different voice roles in the seventh installment of King's Quest. He also returned to Star Wars with Star Wars: Dark Forces, though not in the main roles: He voiced nameless characters (a stormtrooper, a dying Rebel later identified as AdmiralToka) and the narrator.
Delk would not return to Star Wars till 1999, where he would reprise his Zaarin in Star Wars: X-wing Alliance. He showed his versatility by playing different Rebel characters, including a pilot, an officer and a Bothan.