No Man's Sky generates 18 quintillion planets — math makes discovery the whole game

A tiny studio of about a dozen people wanted to make a space exploration game at the scale of an actual galaxy, which is impossible with hand-built content — so Hello Games decided the computer would author the universe.

Replace hand-authored levels with a deterministic generator: 18 quintillion unique planets any player can land on and name — math, not an art team, makes the content.

Hello Games built a deterministic procedural system that generates each planet's terrain, flora, fauna, names and resources from a seed, with a shared galaxy where the first player to reach a world gets to name it; the same algorithm runs on every machine so discoveries are consistent for everyone.

No Man's Sky launched on August 9, 2016 with 18,446,744,073,709,551,616 planets — Hello Games told IGN it would take 585 billion years to see them all; a decade later players had still explored less than 1% of them, and Sean Murray called it one of the best-selling new IPs ever.

No Man's Sky promised what no studio of a dozen people could hand-build: a galaxy-sized space exploration game where every star, planet, creature and name is unique. Hello Games' answer was procedural generation — a deterministic algorithm that authors the universe on the fly from a seed, so the computer creates what an art team never could.

The system produces 18,446,744,073,709,551,616 planets, each with its own terrain, flora, fauna and resources. Because the generation is deterministic, every player's machine computes the same galaxy, and discoveries are shared: the first player to land on a planet can name it, and that name persists for everyone else. Hello Games told IGN before release that seeing all the planets would take about 585 billion years.

The game launched on August 9, 2016 to tens of thousands of negative Steam reviews over broken promises, but the creative core — discovery in a universe no designer ever saw — held. Hello Games kept shipping free updates, improving reviews over years and turning the game around; Sean Murray's GDC 2019 talk 'Grit' described it as one of the best-selling new IPs ever.

On the game's tenth anniversary in 2026, Murray reported that players had still explored less than 1% of the planets, and that the game had seen its highest player numbers since launch — the strongest proof that making the machine the author created content that outlasted any hand-built world.

It inverts the production problem: instead of scaling an art team to match a galaxy, a single deterministic algorithm generates content that is effectively infinite.

First-discovery naming turns exploration into ownership — the player's name becomes permanent data in a shared universe, so discovery itself is the reward.

Deterministic generation keeps the world coherent across every player's machine, letting millions share one consistent galaxy rather than isolated copies.

The idea survived its own launch failure: the generator kept producing new worlds to explore for a decade, turning a hostile release into a long redemption story.

When the vision outgrows the art budget, make the generator the author: a deterministic rule system scales content infinitely, and first-discovery naming turns math into a shared story.

No Man's Sky became a landmark example of a game outlasting its launch: Hello Games shipped free updates including NEXT, Beyond and full VR support, and Steam sentiment climbed from 'overwhelmingly negative' to 'very positive' over roughly a decade. Murray's 2019 GDC talk detailed the grit behind the turnaround, and the studio's next game, Light No Fire, applies the same procedural ambition to a single planet the size of Earth.