With 45M monthly viewers, livestreaming startup Twitch raises $20M — and gets investment from Grand Theft Auto V parent

Livestreaming has become a cultural force in the video game business, and that explains why streaming leader Twitch is announcing today that it has raised $20 million in a third round of funding. The investors include Take-Two Interactive, the publisher of big hit Grand Theft Auto V.

Microsoft and Sony are building Twitch into their next-generation consoles.