Strategic card battle game where you build your empire and engage in multiplayer battles
A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Stage
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Founded
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Based in
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Pricing model
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Freemium
Pricing
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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)
Key features
Strategic card battles with unique card abilities
Empire building and defense mechanics
Resource management system
Extensive collectible card collection
Multiplayer battle mode
Tactical combat with timing mechanics
Vibrant fantasy world graphics
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
What makes it different
Immersive fantasy world with magic and adventure
Combines RTS gameplay with collectible card mechanics
Challenges tactical skills through strategic planning
Endless excitement with multiple gameplay scenarios
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
Like A King
Cosmos Era