Rest in Peace - Jeremy Fitzgerald - Inventor, Caring Father, Coward
— Grave Stone's sign
Animatronic Gargoyle Crow
True Ending POPGOES: Silent Night
Grave Stone is minor character in in POPGOES. He is unlocked after getting the True Ending, along with Simon and the Lux Animatronics. Grave Stone is the main and only antagonist of the now canceled POPGOES: Silent Night. He's the decaying state of Gem Stone after the true ending.
Grave Stone has the same physical appearance as Stone, but he appears to be made of stone and is a gargoyle instead. Unlike any of the animatronics, Grave Stone has no eyes, sharp teeth, and shows signs of decay. He also has no feet and numerous tears in his "suit". Two wings extend out from behind his back, which give him a angel-like look. He also carries around a sign that says: "Rest in peace - Jeremy Fitzgerald - Inventor, Caring Father, Coward".
Grave Stone flies around rooms in POPGOES: Silent Night. To win the night, the player should attempt to crush his limbs in certain rooms; like the Blackrabbit in reverse. They will only win the night if Grave Stone is destroyed.
According to Kane Carter's developer commentary, in the Grave Ending, Gem Stone transforms into Grave Stone. This is meant to be symbolic, in that Popgoes' Pizza had lost its innocence and "honorable company transparency" after Fritz Glade's death.