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"Artificial universes" is a speculative fiction category that centers on worlds deliberately constructed—by advanced technology, artificial intelligences, software, gods, or storytellers—and the social, ethical, philosophical and practical consequences of living inside designed realities. Books in this category explore simulations, virtual realities, procedurally generated or sandbox worlds, digital afterlives, nested or synthetic cosmologies and other man‑made “spaces” whose rules, limits and failure modes shape identity, agency, governance and culture. Expect rigorous worldbuilding and speculative tech alongside questions about consciousness, authenticity, ownership, and the responsibilities of creators; plots often hinge on glitches, hacks, emergent societies, or the tension between inhabitants and their makers. The tone can range from hard science fiction to surreal fantasy or metafiction, appealing to readers who enjoy thought experiments about reality, power, and how meaning is constructed.

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