Name: Yaldabaoth, The Holy Grail, The God of Control, The Treasure of Mementos, The Malevolent God Verse: Shin Megami Tensei, more specifically Persona
The Igor that you meet with up until the last battles of the entire game is merely Yaldabaoth in disguise. It did this prior to the start of the game itself in order to take over the Velvet Room, and take advantage of would-be guests for its own personal use. Yaldabaoth is the first of Persona's antagonists to directly confront and defeat Igor himself. It eventually became so powerful that it developed sentience and a personality, as well as a sense of purpose to uphold the order that it was created to maintain.
Yaldabaoth was created in response to those desires as an entity who could fulfill that desire, and takes the form of the Holy Grail, a famous symbol of wish-granting, to represent its nature.
Humankind as a whole desires to give up free thought and just entrust decisions to a higher power solely because it's easier and would protect them from grief and stress. Mementos is also known as the Prison of Regression or Sloth, because it was created from the collective distorted desires of humanity. In this form, it calls itself the Holy Grail and acts as the treasure of Mementos, the super-palace of humanity. It normally takes the form of a massive golden goblet with spinning gears adorning it and huge vein-like protrusions growing up from it. Yaldabaoth is the self-given name of mankind's treasure, and the primary antagonist of Persona 5.