The special effects are award-caliber in this sequel to the 1982 Tron, the pioneering cult film in computer technology. More good news is that Jeff Bridges is back playing Flynn and his ageless computer avatar, Clu. “The cycles haven’t been kind to you,” Clu cracks wise to his maker. Bridges has a fine time playing with himself, so to speak. Add Garrett Hedlund as Flynn’s son Sam, the rebel who zaps himself into the server to find his lost dad, and director Joseph Kosinski has a recipe for adventure that should delight gamers. Non-techies are on their own.