Halfway through the second round, a line appeared across the top of the screen in a flickering DOS font: "PLAYER: UNKNOWN — PRESENCE DETECTED." Elias paused. His laptop's fan whirred too loudly. He smiled nervously and kept playing. The fighters began to move with decisions that weren't entirely his: the wrench wandered to the edge of the stage and stared down into a chasm that hadn't been part of the level five minutes before. The mage did something clever, leaping off a grocery cart and ricocheting between floating cheeseburgers.