Welcome to SIMMER 2.0!

We just rewrote the entire site and relaunched on Feb 15, 2025.

Need the old site? https://legacy.simmer.io

Need help? Got feedback or found a bug? support@simmer.io, discord

-Rocco, simmer.io founder
Seadragons
Be the baddest sea dragon ever! Move your sea dragon with the mouse cursor & left mouse button to sprint. Devour fish and plankton orbs to grow larger and longer so that you can trap other sea dragons and eliminate them.

Careful though, no matter how big you are, a single impact to other sea dragons = Game Over.

So can you take the crown as the most powerful sea dragon of the sea!
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