Video produced and edited by Justin Wolfson and Sean Dacanay. Transcript coming soon. LOS ANGELES—Though you may have only heard of Brendan "PlayerUnknown" Greene in the past year thanks to the stratospheric success of PlayerUnknown's Battlegrounds (PUBG), gamers have known his work for far longer. His work on the "battle royale" genre goes back to mods he developed for the shooters ARMA III and H1Z1—a fact that's often lost on fans who don't realize Greene worked on those older games, as well. We offered Greene an opportunity to clear up that historical confusion during a chance encounter at last month's Electronic Entertainment Expo (E3).