Levi is the star of NBC's "Chuck." He also is a voice actor for the video games "Fallout: New Vegas" and "Halo: Reach," and owner of the Web site www.TheNerdMachine.com.
"Zac Levi is an avid gamer who is truly a part of gaming culture and understands the fans," Casey Patterson, executive producer and executive vice president of event production, talent and studio relations for Viacom Entertainment Group, said in a statement. "He has great ideas about this year's show. Zac is all about honoring the year in gaming and ushering in the future by showcasing massive world premieres at this year's event. We're excited to be working with Zac."
The prize presentation is to premiere live on Spike TV, MTV2 and Spike.com Dec. 10.