The clip comes from Ultrakill, the fast-paced indie shooter where Cerberus appears as a hulking stone guardian. When Cerberus becomes enraged, its roar signals a faster, more aggressive phase, and players quickly recognised that shift as a perfect audio cue for anger and escalation. Shared through gameplay clips and meme edits, the sound travelled beyond the game itself, and it remains popular because its raw, rocky bellow reads instantly even without any context from Ultrakill.