A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
A daily games hub with no ads
Stage
Not given
Not given
Founded
Not given
Not given
Based in
Not given
SG
Pricing model
Freemium
Freemium
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
Daily puzzle refresh at midnight UTC
Friends and leaderboards
Sign in with Apple for cross-device progress
Restricted version for players under 13
Local storage of streaks and counts
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
Variety of game types: word, logic, number, trivia and arcade games
No tracking or login required - all progress stored locally
New set of games every day
Child-safe with restricted features for players under 13
Cosmos Era
Crux