This is Not Your Grave…
From Halopedia, the Halo wiki
Halo: The Master Chief Collection
In Halo: The Master Chief Collection the achievement is unlocked by completing The Package on any difficulty. The Xbox achievement artwork is a Halo: Reach concept art of the Sabre Program Launch/Research Range facility at Farkas Lake.
- The name is a reference to a quote made by the Gravemind in Halo 2: "This is not your grave...but you are welcome in it."