Peter's Grave is an easter egg in the Call of Duty: Zombies version of Shi No Numa. This version of Shi No Numa lacks the hanging man seen in the starting room. The player must open up all of the huts, and once all the Perk-a-Cola machines spawn, a message will appear saying "All areas unlocked. Now go find the grave!" A Shovel then replaces the player's knife. The Shovel itself is stronger than the knife. The player should walk around the map looking for a grave that appears as a cross with Peter written on it. Once found, an icon saying "Dig" will appear. The player must simply tap the icon and will be rewarded with a Wunderwaffe DG-2 (it will replace the weapon the player is currently holding).
- If the player already has a Wunderwaffe DG-2 then he will lose his second weapon and get his Wunderwaffe's ammo refilled.
- Because it ends with giving the player a Wunderwaffe DG-2, two players can have them at once if one gets it from the Mystery Box and the other gets it from completing the easter egg.
- The grave will randomly spawn only after opening all of the huts in one of five locations: each of the four huts and the courtyard by the Flogger.