ANAHEIM (AP) -- The nation's video game athletes have gathered in Southern California to battle aliens and bad guys.

The Orange County Register said more than 1,000 eSports players are taking part in the Major League Gaming Championships in Anaheim, which began Friday and run through Sunday.

The contestants don special headphones and face off in soundproof booths in games such as "StarCraft II," "Call of Duty: Ghosts" and "Super Smash Bros. Melee." Announcers provide the play-by-play.

They're playing for glory and $150,000 in prize money. Some have practiced up to 12 hours a day.

About 1,500 people can watch the games live, and more than 2 million from around the world are expected to watch online.