William Shatner is set to voice Captain Kirk in Star Trek: Legacy, and the veteran actor says he signed on because he couldn't accept anybody else playing Kirk.

"I couldn't imagine someone else playing Captain Kirk, even in a videogame," he told Reuters, "so I kind of got a little territorial".

"If it's a good game, keeping true to the characters the best they can and having an interesting story that branches, I think a game can bring a freshness to a franchise like Star Trek," he added.