This sound is from Announcer - Mortal Kombat vs. DC Universe - Miscellaneous (PlayStation 3)

Fatality is the name given to a gameplay feature in the Mortal Kombat series of fighting video games. Players have a short time window to execute a Fatality by entering a specific button and joystick combination, while positioned at a specific distance from the opponent.
See also: Captain Marvel (DC Comics), Fred Tatasciore, Troy Baker, Kari Wahlgren filmography, Cree Summer, and List of fictional robots and androids.