It's the most popular video game of all time, and Thursday Halo brought a crew of top gamers to Knoxville.
Battlefield Knoxville out on Kingston Pike sponsored the event, and organizers say some people drove up to six hours to play in it. Winners took home cash prizes.
"They take it really seriously. They have top-of-the-line headset, top-of-the-line controllers, custom controllers, they have their strategies, they have their official team names," said Regan Graham with Battlefield Knoxville.
The most promising team will be sponsored by Battlefield Knoxville for professional gaming competitions.
Microsoft released its latest installment, Halo 4, last November. It racked up $220 million in global sales on its launch day.