Simulation theory presents two distinct perspectives: NPC (Non-Player Character) and RPG (Role-Playing Game) versions. NPC simulations treat all entities within the simulation as AI, raising questions about whether we are merely algorithms executing pre-defined roles. In contrast, RPG simulations posit that we exist outside the simulation, controlling avatars within it, akin to modern MMORPGs. This duality influences the understanding of who might exist outside the simulation and who could have created it. The concept of a technological singularity, originally defined by Verner Vinci, suggests a point where technology evolves exponentially, culminating in our ability to create simulations indistinguishable from reality. Crucial advancements required to reach this simulation point include brain-computer interfaces and sophisticated AI, allowing for NPCs that convincingly replicate biological characters. As technology progresses, the separation between real and simulated experiences increasingly blurs, hinting at the potential future where virtual realities may become indistinguishable from physical existence.