About Cosmos Era

Cosmos Era is a hard sci-fi idle evolution game: start from a singularity, pass through 12 eras, and reach an interstellar civilization. Play in your browser; install it on your phone.

In the game, 1 light-year = 1 real hour, and nothing travels faster than light. Every node lists its real-world source; invented parts are marked as game lore.

The game is free to play, with no ads. Payment only buys time and convenience.