A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
Stage
Startup
Not given
Founded
2025
Not given
Based in
US
Not given
Pricing model
Free
Freemium
Pricing
Not given
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
Live multiplayer matches with online matchmaking
Daily turn-based games that progress over days
Five difficulty levels of AI bots from Easy to Master
Private games with friends via shareable links
Leaderboard and ranked tournaments
Four free expansions: River Path, Taverns & Temples, Merchants & Makers and Abbot
Supports 2 to 10 players per game
No download required, plays in any browser
iOS and Android apps with cross-device sync
No ads and no pay-to-win mechanics
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
Play as guest instantly with no account or download required
Built with direct player feedback from Discord and in-game feedback
Independent game made by single developer, not affiliated with official Carcassonne
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
Seizer
Cosmos Era