Cosmos Era

About Cosmos Era

Cosmos Era is a free, ad-free browser idle game that compresses 13.8 billion years of cosmic history into one playable year. Players evolve from a singularity through 12 eras across Cosmos, Life, and Civilization, unlocking 16 different endings. Every wiki entry cites real scientific sources with years and researchers documented.

The game features 1,400+ nodes grounded in real science, with invented elements clearly labeled as game lore. Players discover 12 civilization channels inspired by science fiction novels like Rendezvous with Rama and Solaris, as well as real scientific concepts such as the Fermi paradox. The game uses scientific physics: 1 light-year equals 1 real hour, and nothing travels faster than light.

Access is completely free with no ads, playable in any browser or installable on phone home screens for offline progression. Optional paid features include Supporter subscriptions (monthly, yearly, or lifetime) and time crystal packs for faster progression, but payment only buys time and convenience, never competitive advantage.

• science fiction
• cosmic calendar
• free to play
• simulation
• idle game
• browser game
• educational

FAQ

Can I play Cosmos Era offline?

Yes. The game runs in any web browser without download, and you can install it on your phone's home screen for offline play. Your progress syncs to the cloud when you sign in with an account.

How long does it take to complete Cosmos Era?

With free play, a full playthrough takes approximately 68 days in the game's pacing simulation. With a Supporter subscription doubling output, this is reduced to about 41 days.

What happens to my progress if I cancel a Supporter subscription?

You keep all your progress and crystals intact. The benefits are removed and you return to the free version, but your save continues forward.

What is the refund policy?

Time crystal packs are fully refundable within 7 days if the crystals have not been claimed into the game. Claimed crystals and Supporter subscriptions are refundable within 7 days. To request a refund, email support@cosmos-era.com with your payment email and order number.