A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Explore Flags, Challenge Yourself, Learn Without Limits
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
6 attempts to identify the correct region
Distance feedback in kilometers
Accuracy percentage after each guess
Unlimited practice mode with random puzzles
Progress tracking dashboard with statistics
Personal wins and winning streak tracking
Browser local storage persistence
Social sharing integration
Global leaderboard comparison
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
Unlimited practice rounds unlike daily-only alternatives
Immediate retry of failed challenges
Three types of directional feedback per guess
Educational resources about flag history and significance
Cosmos Era
Flagle Explorer