Sarah Janssen. Stephen Lovekin/ Mark Von Holden hide caption

toggle caption Stephen Lovekin/ Mark Von Holden

Jason Munkel and his father stream their Call of Duty games online every night. In the past year, they've gained more than 120,000 followers. Twitch/Activision hide caption

toggle caption Twitch/Activision
NPR
Chip Somodevilla/Getty Images

A screenshot of the online multiplayer Pokemon game. Twitch.tv hide caption

toggle caption Twitch.tv

Warriors battle at the 2012 JORVIK Viking Festival. This year promises to be even fiercer, with the apocalypse looming. Allan Harris/Flickr.com hide caption

toggle caption Allan Harris/Flickr.com
NPR

NPR thanks our sponsors

Become an NPR sponsor