From Halopedia, the Halo wiki
Halo: Anniversary A.C.E. was a career award found on the web version of Halo Waypoint from 2009-2014 and on the Xbox 360 version until its discontinuation in 2022. It was represented by the Halo "O" logo on a spade-shaped medal with a red, white and blue ribbon. The award consisted of all 44 Halo: Combat Evolved Anniversary achievements. The achievements were organized into four tiers.