From Halopedia, the Halo wiki
This article is about the medal. For other uses, see Killtacular (disambiguation).
The Killtacular medal (also called Kill Frenzy in Halo 2) is awarded for killing five opponents within four seconds of each other in standard multiplayer games (and Halo: Spartan Assault) and within less time in campaign and Firefight. In Halo 4 multiplayer and Spartan Ops the kills need only be within 4.5 seconds of each other.
Originally, the medal was represented by a silver circle with five purple stars. In Halo 4 it is represented by five white stars on a green circle rimmed with light green and brown. The medal is monochrome and imposed on a shield in Halo: Spartan Assault and Halo: Spartan Strike. When a player earns this medal the announcer will shout "Killtacular!" to the player that received this medal.