No One Left Behind (Halo Infinite achievement)

From Halopedia, the Halo wiki

This article is about the Halo Infinite achievement. For the Halo 4 achievement, see No One Left Behind.
No One Left Behind

No One Left Behind is an achievement in Halo Infinite. It is unlocked by answering all UNSC distress calls. This achievement awards the player 20 Gamerscore.