He is also an alumnus of Triangle Fraternity[3] and received his bachelor's degree in Electrical Engineering in 1990 from the University of California, Los Angeles (UCLA).

[4][5] In sixth grade, Morhaime, along with his brother and sister, purchased a video game console called the Bally Professional Arcade, first released in 1978.

"[6] While at UCLA, Morhaime met Allen Adham and Frank Pearce and, in 1991, the three founded the company Silicon & Synapse, later renamed Blizzard Entertainment.

Besides its large number of sales, "it was the first game you could play over the Internet with a good experience," which was a novelty at the time, as well as being a defining selling point for its later titles.

[6] In planning for the release of World of Warcraft (WoW) in late 2004, Morhaime thought that the market for the much larger and more interactive new game, the first in their history to require players to pay a monthly subscription fee, would grow slowly.

[12] Following Morhaime's departure from Blizzard, in July 2021, the California Civil Rights Department (CRD) (formerly known as the Department of Fair Employment and Housing) filed a lawsuit against Activision Blizzard for sexual harassment and gender-based discrimination in relation to unequal pay and retaliation against female employees in the workplace.

[18] On the same year, Morhaime was honored at the 59th Annual Technology & Engineering Emmy Awards for Blizzard's creation of World of Warcraft.

[21] In 2012, Morhaime made a cameo appearance on The Guild, a web series about the lives of a gamers' online experiences with an MMORPG that draws references to World of Warcraft.

[23] He is a member of Elite Tauren Chieftain, a metal band formed of and by Blizzard employees, where he plays bass guitar.