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
Upgrade your slime
Not a great game but it exists, Have fun!

Move with wasd shoot with left mouse.

Boss at 200 and 400 seconds.
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