Musk had an embarrassing gamertag

In the early days of SpaceX, Musk’s commercial spacecraft venture, Musk played multiplayer shooter Quake III Arena as “Random9.” Just “Random9.”
“Musk and the other young engineers would work late into the night and then fire up […] Quake III Arena […], conference together their cell phones, and plunge into death matches that could last until 3 a.m.,” Isaacson says.
Random9 played the most aggressively, “(of course),” Isaacson writes.