Halo 3 A.C.E.

From Halopedia, the Halo wiki

Halo 3 tier 5.png

Halo 3 A.C.E. is a career award found on the Xbox 360 version of Halo Waypoint.[1] It is represented by a scorpion on a spade-shaped medal with a red, white and blue ribbon. The award consists of all 79 Halo 3 achievements. These achievements are organized into five tiers.