The sound comes from The Elder Scrolls IV: Oblivion, Bethesda's 2006 open-world role-playing game, where Imperial guards patrol Cyrodiil. Oblivion guards became a lasting meme because of their serious voice acting and abrupt lines, so their combat grunts and death yells were ripped and shared on soundboards and in machinima. This second death variant survived because it is brief, recognisable to anyone who played the game, and flexible enough to mark any video game death, fail or knockout without needing context from the original scene.
About this sound
The guard death cry from The Elder Scrolls IV: Oblivion, a short pained yell used in gaming edits and memes for dramatic or funny character defeats.
This is the short death sound of an Imperial guard from The Elder Scrolls IV: Oblivion. It is a strained, pained yell that cuts off quickly as the character collapses, with the slightly theatrical delivery the game's guards are famous for. At under a second it lands like a punctuation mark, turning an ordinary defeat into something instantly funny or dramatic. The over-the-top pain in the voice makes even a minor fall or fail feel like a final heroic moment, which is why editors reuse it far outside the original game.