Forge a universe from nothing to transcendence. Tune 6 physical constants, master the quantum Observer Effect, and prestige through endless cosmic layers. A deep, fully deterministic idle game, no microtransactions.

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About This Game

NEXUS PRIMORDIAL

You are a cosmic consciousness, forging a universe from before time. Accumulate energy, bend the fundamental laws of physics, and guide reality from the empty Void all the way to Transcendence — then collapse it in a Big Crunch and begin again, more powerful than before.

Tune the laws of reality

Six Universal Constants — Gravity, Vacuum Energy, Planck, Fine Structure, Arrow of Time and Chaos — apply to your entire universe at once. Every setting has cascading positive AND negative effects. There is no single "best" build: the challenge is finding the balance that fits your strategy.

The Observer Effect — no RNG, ever

You can actively observe only ONE of the 7 eras at a time. Unobserved eras enter quantum superposition and release bonuses on a fixed timer — 100% deterministic and guaranteed. No loot-box luck, no bad streaks: every reward is earned, never random.

7 eras to awaken

Void → Matter → Stars → Worlds → Life → Intelligence → Transcendence. Each era produces its own resource, has a unique Trait, and feeds the next through inter-era synergies. Neglect nothing — your earliest eras keep boosting your entire universe to the very end.

Prestige without end

  • Big Crunch — collapse the universe for permanent Cosmic Relics

  • Relics Tree — 16 upgrades across 4 branches, including full automation

  • The Forge — 4 Primordial Laws that rewrite the rules

  • The Beyond — climb 3 Rungs of Ascension and become the Demiurge

  • The Great Spiral — fold finished universes into Genesis Seeds for permanent, endless growth

Built to respect your time

  • Progresses on its own — up to 24h of offline catch-up

  • Era Mastery and a Cosmic Research tree that survive every reset

  • Optional automation: let the universe run itself

  • 81 achievements to chase

A premium experience

  • One-time purchase — no microtransactions, no ads, no energy timers

  • Fully playable in 7 languages: English, French, German, Spanish, Russian, Simplified Chinese, Brazilian Portuguese

From a single fluctuation in the dark to the birth of cosmic consciousness — the Spiral is waiting. How far will you take it?

System Requirements

    Minimum:
    • OS: Windows 10 64 bits
    • Processor: Dual-core 2 GHz, 64-bit (Intel Core i3 / equivalent AMD)
    • Memory: 2048 MB RAM
    • Graphics: Vulkan 1.0 compatible — Intel HD Graphics 620 / NVIDIA GeForce GTX 600 / AMD Radeon HD 7000 or newer
    • Storage: 300 MB available space
    • Sound Card: Optional
    • Additional Notes: Vulkan rendering: up-to-date graphics drivers recommended. 100% offline game, resizable window, adjustable interface scale.
    Recommended:
    • OS: Windows 10 / 11 64-bit
    • Processor: Quad-core 2.5 GHz (Intel Core i5 / AMD Ryzen 3)
    • Memory: 4096 MB RAM
    • Graphics: NVIDIA GeForce GTX 1050 / AMD Radeon RX 560 or newer
    • Storage: 300 MB available space
    • Sound Card: Optional
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