Valve has explained why it chose Extras star Stephen Merchant to voice Wheatley in Portal 2.
Writer Chet Faliszek told DS that Merchant's mannerisms matched those they had in mind for the robot support character.
"Really it was more about that they were the voices in our heads for the characters," he revealed. "Stephen Merchant in particular, we just had that voice in our head, and his pacing has a distinct way of speaking [and] a way of making us laugh."
He continued: "So we were happy to get him, totally surprised we could, and he was a natural fit. It was great working with an actual comedic actor himself, because he knows timing, he knows how to tell a joke and knows about pacing, and that's really important."