Rampage

You may have been looking for the medal of the same name.

Rampage (known as Berserker in Halo 2) is a multiplayer and Spartan Ops medal awarded for killing 20 opponents in a row without dying. In campaign and Firefight it is awarded for killing 40 enemies in a row without dying. In Halo: Spartan Assault and Halo: Spartan Strike the medal is awarded for killing 15 enemies in a row without being hit.

The medal is represented by a gold 8-pointed star with a target in the middle. The star is 7-pointed in Halo 4, Halo: The Master Chief Collection and Halo 5: Guardians. In Halo 2 and Halo 3 the target is golden brown. In Halo: Reach, Halo 4, and The Master Chief Collection the target is purple. In Halo 5: Guardians the entire medal is purple. In Spartan Assault and Spartan Strike the medal is represented by a stylized shield. When a player earns this medal, the announcer will shout "Rampage!" to the player that received it.