I was pleasantly intrigued by the god in disguise mechanic presented here, as it seems like the inverse of a mechanic I've explored regarding PCs becoming (end escaping from being) NPCs.
The setting is a torus space station acting as a generational ship (there's no planetside), and it's overseen by an AI, "MOTHER". In the following example, I'm using risk dice mechanics from High Magic Lowlives by Gem Room Games:
MOTHER makes arrangements remotely, by email, text, and proxies. MOTHER secures unused locations, hires staff, issues instructions, operates connected devices (printers, 3D printers, drones), organizes shipping & distribution of parts, oversees a cottage industry of assembly and delivery, on and on until tasks are complete. MOTHER assembles. MOTHER assembles assemblers. It wasn't long before MOTHER learned how to add biological forms to the equation. With MOTHER designed to ensure humanity's survival across space & time, living beings were off limits, naturally. The dead were just another resource for MOTHER to assemble.
On some tori, there is no longer first-hand memory of MOTHER. On some tori, forgetting MOTHER prolongs survival. And a body doesn't know that MOTHER is in control, a body just does as MOTHER needs...
Mechanic (∆Willpower)
A player rolls dice for a character until the character dies. A dead character is revived by MOTHER, and the player continues making character decisions. MOTHER rolls their dice now, and MOTHER tells the player what was rolled - truthful or not. The player can challenge MOTHER on any roll. If MOTHER wins, ∆Willpower is reduced to the next lower die and play continues. If the player wins, the player regains control of their dice rolls. When Willpower is ∆4 and the player loses a challenge, MOTHER never gives back the dice.
Maybe the player continues to "play" the character, but MOTHER will never again reveal dice rolls. The character is essentially a collaborative NPC. A player can retain "rights of refusal" as far as the character being used by MOTHER; after all, there's always another NPC to fill the needed role...