Hell's Janitor

Hell's Janitor is a multiplayer medal in Halo 3, Halo: Reach and Halo 5: Guardians awarded for killing ten Zombies in a row without dying in the Infection game variant.

In Halo Infinite, the medal is instead earned after killing thirty Infected without dying, with the medal for killing ten Infected now being Zombie Slayer.

It is represented by a bronze five-pointed star with a deformed green skull on a green background in the center.

Trivia
This medal is "officially" obtainable in the Double EXP Weekend Playlist Living Dead to be viewed on Bungie.net.