A Kotaku tipster seems to have stumbled upon a casting call for "a character for a new game in the Portal series from Valve Software" on subscribers-only actors resource Breakdown Express. The posting is loaded with character details for the game's "principal antagonist," including his history, demeanor and general outlook on life. The posting even details how the character's psychology changes as the story progresses, hinting at some intriguing story possibilities for the sequel to our top game of 2007.

If you don't mind having such important details spoiled at least seven months before the game is released, follow the read link and, er, read all about it. Or, if you're a voice actor who can handle "dark comedy ... with occasional dramatic moments" starting next month, why not try out for a piece of video game immortality?

This article was originally published on Joystiq.

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