Overachiever (Halo: The Master Chief Collection achievement)
From Halopedia, the Halo wiki
This article is about the Master Chief Collection achievement. For the Halo: Spartan Assault achievement, see Overachiever.
Overachiever is an achievement in Halo: The Master Chief Collection. It is unlocked by beating the par scores on all Halo: Combat Evolved levels. The achievement is worth 20 Gamerscore. Though theoretically it can be unlocked on any difficulty, more points are awarded in campaign scoring when playing on higher difficulties.