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Start as a fish, eat your way up the ocean food chain. Dozens of animals, each with its own abilities and habitat. 2016, Federico Mouse.
Deeeep.io is a free eat and grow io game (evolution, food-chain, free-for-all). You start tiny. Everything smaller is food, everything bigger is death. The loop Agar.io invented in 2015, and the food-chain games that grew out of it. It ran when last checked, on 2026-09-16.
The game loads from deeeep.io in a frame. Its own terms, privacy policy, ads and accounts apply inside it, and a save made here is separate from one on deeeep.io. If you already have progress there, open the game on its own site. How the frames work.