Thus, kills are very easy to get, especially if the player spawn kills. An easy way to get this medal is in Grifball, which is played in close quarters with Gravity Hammers and Energy Swords.Earning this medal in a ranked free-for-all Halo 3 matchmaking match will unlock the Overkill achievement, as well as the Commando harness helmet and Ascetic harness shoulders.

In Halo 2 the medal is called a 'Killtacular.' Earning the medal in a Halo 2 for Windows Vista multiplayer game will unlock the Killtacular achievement.

Receiving this medal results in the announcer shouting 'Overkill!' to the player. The medal is monochrome and imposed on a shield in Halo: Spartan Assault and Halo: Spartan Strike. In Halo 4 it represented by four white stars on a forest green circle rimmed with green and brown. Originally, the medal was represented by 4 green stars in a bronze circle.

In Halo 4 multiplayer and Spartan Ops, the kills need only be within 4.5 seconds of each other.

The Overkill medal (also called Killtacular in Halo: Combat Evolved and Halo 2) is awarded for killing four opponents within four seconds of each other in standard multiplayer games (and Halo: Spartan Assault) and within less time in campaign and Firefight.

Overkill achievement halo 3