Esports is taking over college campuses, evolving from a hobby to a career path. With over 200 U.S. colleges offering varsity teams and degrees, students are gaining skills for diverse industries.

To an untrained eye, entering the Valhallan Esports Training building in Las Vegas looks like kids playing video games. Instead, it is the foundation of an exploding industry.

G2 was founded in 2015 by former League of Legends pro Carlos “ocelote” Rodríguez Santiago and investor Jens Hilgers. It’s ...