Mortardom

Mortardom is an achievement in Halo 4 and Halo: The Master Chief Collection. It is awarded in the fifth campaign level, Reclaimer, for boarding a Wraith and using it to destroy four enemy Wraiths on Heroic or harder. In Halo 4, the achievement is worth 20 Gamerscore and is represented by a Wraith on four five-pointed stars. In Halo: The Master Chief Collection, it is worth 10 Gamerscore and is represented on the Steam icon by a Wraith, and an image of the map Vortex on the Xbox art.

Trivia
The achievement name is a play on the words "mortar" and "Martyrdom".