A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
A free browser life simulator where you are born randomly and live one life to its end
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free with no ads; optional Supporter: $2.99/mo, $19.99/yr, or $29.99 lifetime; time crystal packs: $1.99 (Skip a night), $4.99 (Skip a wall), $9.99 (Skip a week)
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Key features
13.8 billion year cosmic timeline from Big Bang to interstellar civilization
118 sourced research cards with scientific citations
12 game eras spanning Cosmos, Life and Civilization
16 different endings
12 civilization channels inspired by science fiction and real concepts
Playable on phone, desktop and iPad with cloud save sync
Installable on phone home screen for offline play
No ads and completely free to play
1,400+ nodes each grounded in real science with sources
Physics-accurate simulation where 1 light-year equals 1 real hour
Play 172 countries with real birth statistics
Life decisions affect outcomes
Realistic mortality and life expectancy data
Gameplay from age 0 to death
Optional text-to-speech narration
Share life summaries and life cards
Play at variable speed or pause
Auto mode to watch without deciding
10 languages including Chinese, Japanese and Vietnamese
Local browser storage, no cloud account required
What makes it different
Every scientific claim cites real sources with year, researcher and publication
Hard sci-fi design where physics and signal times follow real scientific laws
Completely free with no ads, payment optional and never pay-to-win
Invented game lore clearly separated and labeled apart from real science basis
Curated collection of 24+ open-source astronomy, physics and biology projects
Built on real UN and World Bank data, not randomization
Independent edition separate from the original 1in8b.life project
Covers inequality, illness and mortality at real rates
Cosmos Era
1 in 8 Billion