Viktor clicked download. He knew better, but the nostalgia for the Martian corridors was stronger than his caution. The file was tiny—only 66.6 kilobytes. Impossible for a game that size, yet when he ran it, the familiar red logo bled onto his screen.

He reached the first encounter. A scientist turned into a screaming husk. Viktor fired his shotgun. The kickback didn’t just shake the controller; a sharp, metallic tang of gunpowder filled his bedroom. A drop of warm, dark liquid splashed onto his keyboard. He wiped it away. It was blood.

The prompt translates to "Free download of Doom 3: BFG Edition."

The air in the room grew thin and sulfurous. The red emergency lights of the game began to pulse against his real walls. Viktor realized then that "BFG" didn't stand for the gun anymore. As the progress bar hit 100%, the monitor didn't go dark. It opened like a door.