Halo 3 Achievements: Killtacular, Extermination, and Perfection Medal?

[SephirothM15]

On a Mythic map, get a Killtacular during any ranked or social match.
On a Mythic map, get an Extermination during any ranked or social match.
On a Mythic map, get a Perfection medal during any ranked or social match.
What is a Killtacular?
What is a Extermination?
What is a Perfection Medal?

 

[Andrew]

They are all awards given in an online match based upon number of kills, and kill streaks.