Untouchable

The Untouchable Medal is awarded for killing 25 opponents in a row without dying. It is available in all Multiplayer gametypes. Due to its rare nature, the medal is not displayed in Ranked statistics on Bungie's website, although it is displayed in Social statistics. It is assumed to have a Bungie difficulty rating of 10 (out of 10) due to the fact that to kill 20 opponents in a row has a difficulty rating of 9. This medal is very rarely seen and is represented by a 16-sided silver star with a yellow target in the middle. In Halo 2, this medal was called Overkill.