Leave It Where It Lay
From Halopedia, the Halo wiki
Leave It Where It Lay
Leave It Where It Lay is an achievement in Halo: Combat Evolved Anniversary that is awarded for completing the level Two Betrayals without picking up any other weapons on Legendary difficulty.[1] It is represented by a hand grabbing for an MA5B assault rifle with a "forbidden" sign over it.
It is worth 25 Gamerscore points.
Sources