Play Agar.io at School | Classroom 6x unblocked

🔵 Agar.io Unblocked

Mouse to move | Space to split | W to eject mass

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Ash Mercer

Updated June 2026 · 5 min read

Play Agar.io at School: Agar.io Explained

The entire .io game genre exists because a 19-year-old Brazilian developer named Matheus Valadares built Agar.io Unblocked in a few days and posted it on 4chan on April 28, 2015. It went viral overnight. Every IO game since: Paper.io, Wormate.io, Shell Shockers: traces back to this one. Tested it fresh for this review. Spent 30 minutes on the server without planning to. The concept is 20 words but the strategy runs deep.

What You're Actually Doing

You are a circle in a petri dish full of other circles. Eat the smaller dots scattered around the map to grow. Eat players smaller than you to absorb their mass. Avoid players larger than you or they absorb yours. Press space to split your cell: it launches half your mass forward, useful for catching prey or escaping traps. Press W to eject small amounts of mass at viruses or to feed allies. The leaderboard shows the largest cells on the server at any moment. Getting to the top requires staying alive long enough to grow, which is harder than it sounds when 30 players are all doing the same thing.

Controls

Mouse: Move your cell in the cursor direction
Space: Split your cell: launches half mass forward at speed
W: Eject mass: feeds viruses or allies
Objective: Eat smaller cells, avoid larger ones, reach the leaderboard

Why This Works at School

Each session lasts however long you survive. Two minutes or twenty, it fits any break. classroom 6x unblocked has Agar.io ready when you open a tab. Tested on school Chromebook hardware. Loads fast on shared WiFi. Play Agar.io at school between periods. Agar.io Unblocked Chromebook works on every device tested.

How to Last Longer

Start small, think later: New cells start tiny and die fast. Spend the first two minutes eating dots only. Do not try to eat other players until you have enough mass to survive a split attack.
Split hunting requires a gap: Splitting at an opponent only works if you have clear space to follow through. Splitting into a cluster of large cells feeds them instead of killing anything.
Viruses are cover when small: Green spiked viruses explode large cells that run into them. When you're small, staying near viruses forces large players to avoid the area. Use them as cover.
Don't eject mass at random: W is for feeding viruses to pop large opponents or feeding allies. Randomly ejecting mass makes you smaller and feeds anyone near you.
Take the edges first: The center of the map is the most dangerous area. The edges are quieter. Grow safely on the edges before moving toward the center where the largest cells compete.

Developer

Agar.io was created by Matheus Valadares, a 19-year-old Brazilian developer using the pseudonym Zeach, written in JavaScript and C++. Released April 28, 2015 after being announced on 4chan without a name. Miniclip acquired the rights and released mobile versions in July 2015. The game that defined an entire genre.

Common Questions

Yes. Agar.io is considered the game that created the IO game genre. Released April 28, 2015, it inspired Slither.io, Wormate.io, Paper.io, and dozens of others. Every IO game owes something to what Valadares built in a few days.

Agar.io loads directly in the browser. Tested on school Chromebook hardware. Chrome handles it without any issues. Agar.io Unblocked Chromebook runs clean on every device tested.

Splitting divides your cell into two equal halves. One half launches at high speed toward your cursor. This is used to catch smaller cells too fast to catch normally, or to escape large cells by having a smaller piece that's harder to target.