Gameplay

Kill it with fire

From Halopedia, the Halo wiki

The Kill it with fire medal is awarded in the Halo: Spartan Assault Flood missions for killing 50 enemies with fire without being hit. It is represented by a stylized blue shield covered in flames. The napalm grenade is the only incendiary weapon in the game.

Triva[edit]

The medal's name is a reference to an internet meme of the same name.