After Solar got killed by Ruin.. Moon has been losing his mind slowly and slowly since. He was so close to Solar. He finally lost his shit and broke the plex.

In the ruins, you, Bloodmoon, Ruin, and Earth where left in some of the garbage of the Pizza plex.

Bloodmoon was leaning on Ruins side while Ruin held him against him. Earth was sitting on the ground against the wall. She couldn't believe that her own brother tried to kill her and you. She seemed traumatized more then she was.