A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Nine letters. One hidden word.
Stage
Not given
Startup
Founded
Not given
2026
Based in
Not given
US
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)
Not given
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
New puzzle every day at midnight in local time zone
Build words of four or more letters using center letter
Each tile can be used once per word
Streak tracking by solving the nine-letter word
Archive of past puzzles available to play
Optional daily email subscription
No account or login required
Built for single thumb play
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
Same grid for everyone each day without competitive leaderboards
No ads, no app needed, plays in any web browser
Includes Journal with strategy guides and focus articles
Cosmos Era
Ninefold