Cosmos Era is now playable in your browser
A hard sci-fi idle game from the Big Bang to an interstellar civilization. Play it in your browser, or install it on your phone's home screen and play offline.
Cosmos Era is a hard sci-fi idle evolution game. You start at the singularity, pass through 12 eras, and end up with an interstellar civilization. In the game, 1 light-year equals 1 hour of real time, and nothing travels faster than light. Every node lists its real basis and sources. Anything invented is marked "game lore". Start evolving
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Real basis and game lore: how Cosmos Era tells fact from fiction
Every evolution tree node has two fields, "real basis" and "game lore". The first gives years, names, numbers and sources. The second holds everything invented.
Cosmos Era guide: how to discover all 12 civilization channels
12 civilization channels, each with its own discovery condition: protect cephalopods on Earth, build certain things in the interstellar era, or get found out.
Cosmos Era crafting bench guide: from quarks to ribose
Crafting bench guide: nuclear reactions add atomic numbers, chemistry conserves atoms. 51 recipes, learned once, then auto-crafted in each new universe.