This sound comes from Doom, the 1993 first-person shooter from id Software that defined the genre and its crunchy digitized audio. When the player shoots an enemy — from lowly troopers to the Barons of Hell — this brief pain sound plays, and across thousands of hours of gameplay it became one of the most heard effects in PC gaming history. It survived through source ports, total conversions and endless Let's Plays, and today creators rip it as a standalone hit marker because it instantly signals retro FPS combat to anyone who grew up with a mouse and keyboard.