Was trying to 100% complete but it seems like a lot of the Grandpa stuff is broken.
It requires the call "StageTwoCorruption($npc.Grandpa)" to be true which would mean "return game().dev.galleryMode || (npc.corruption >= 10 && npc.arousal >= 2);"
The problem is that there is never a call to increase the Grandpa's corruption as it is set to 0 on start so it will never be >=10.