What video game is featured in the iPhone 6 commercial with Jimmy Fallon?

The iPhone 6 and iPhone 6 Plus commercial titled "Gamers" features Jimmy Fallon and Justin Timberlake playing the video game Vainglory by Super Evil Megacorp. The game was featured in the commercial because it utilizes Apple's A8 processor to deliver high quality 3D graphics.

Vainglory is a multiplayer battle arena title for both the iPhone and iPad. It was also showcased at Apple's September 2014 keynote and is available for free on the App Store.