Vivendi Games' Sierra Entertainment today announced that it has secured top Hollywood talent to provide voices for the characters featured in TimeShift, a first-person shooter developed by Saber Interactive and featuring more than 30 combat missions, each showcasing time control elements. Dennis Quaid, Nick Chinlund and Michael Ironside will add their voices to this game due to ship this September, for PC and Xbox 360. Press 'read more' for details and grab the single-player demo locally mirrored here if you haven't done so yet.