A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
A free memory game inspired by Ayumu the chimpanzee at Kyoto University
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
Progressive levels that add numbered squares
Flash window shrinks as difficulty increases
Three-strike game over system
Local browser storage of scores
Challenge links with shared level difficulty
Customizable flash speed via URL parameter
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
Based on genuine peer-reviewed research from Kyoto University's 2007 Ayumu experiment
No account, no download, no personal data collection
Includes detailed educational articles about the original experiment and memory science
Cosmos Era
ChimpTest