.io Games

Free browser .io games you can play instantly. Battle snakes, capture territory, eat cells, shoot tanks, and evolve animals. Each game has a classic version and a modded variant with power-ups.

🐍 Snake Battle

🐍

Slither Royale

Grow your snake, outmaneuver bot opponents, eat food pellets, and dominate the arena in this slither.io-style battle!

Snake battle with power-ups! Collect shields, speed boosts, magnets, ghost mode, and more in this slither.io-style game.

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🗺️ Territory Capture

🗺️

Territory Wars

Capture territory by enclosing areas on the grid! Outmaneuver bots in this paper.io-style strategy game.

Capture territory with power-ups and a shrinking safe zone! Paper.io meets battle royale in this strategic arena game.

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🧫 Cell Arena

🧫

Cell Eater

Eat food and smaller cells to grow, split to catch prey, and dominate the arena in this agar.io-style game!

Agar.io-style game with virus cells and power-ups! Pop large cells, collect boosts, and dominate the arena.

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🔫 Tank Shooter

🔫

Tank Arena

Diep.io-style tank shooter! Destroy shapes, level up, upgrade 7 stats, evolve your tank class, and dominate 6 bot opponents.

Tank shooter with power-ups and shrinking arena! Rapid fire, shields, mega bullets, EMP blasts, and battle royale zone.

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🦁 Evolution

🦁

Mope Evolution

Mope.io-style animal evolution game! Start as a mouse, eat food, evolve through 10 tiers to Black Dragon. Use unique abilities!

Animal evolution with mutations and toxic zones! Gain venomous, thick skin, speed burst, regen, or camo at each evolution.

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What Are .io Games?

.io games are a genre of browser-based multiplayer games that became hugely popular starting with agar.io in 2015. The ".io" comes from the domain extension originally used by these games. They share common traits: simple controls, competitive gameplay, real-time action, and instant access with no downloads required.

Classic .io games include slither.io (snake battles), paper.io (territory capture), agar.io (cell eating), diep.io (tank shooting), and mope.io (animal evolution). Our collection features free versions of all these styles, plus modded variants with power-ups, mutations, and battle royale mechanics.

Every .io game on PlayBrain runs entirely in your browser with smart bot opponents. No downloads, no accounts, no lag from online servers. Just click and play.

Want more? Browse all 385 games on PlayBrain.

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