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Odd One

A visual search game. Find the odd one out, fast. Then find it in the dark.

Odd One is a visual search game. A grid fills with the same little symbol over and over, except one tile that’s a bit off. Find the odd one out and tap it. Then do it again, on a bigger board, with a smaller difference, against the clock.

It starts as an easy spot the difference on a 3×3 grid and grows to 9×9, where the odd tile is turned by just 15 degrees or drawn a shade lighter. Then, from the 10th board, the lights go out: only a small circle of light shows the tiles, and you have to sweep it around to find what you’re looking for.

Odd One is part of Unrot, a series of twenty short games that each put one mental skill to the test: memory, attention, speed or logic. Twenty games. Zero brainrot.

How to play

  • One tile is different: it’s turned, it’s missing a line, or it’s a shade lighter. Everything else is identical.
  • Tap it. Each find brings a new, bigger or trickier board.
  • A wrong tap costs 2 seconds, so don’t just tap around.
  • From the 10th board the grid goes dark. Move your mouse, drag a finger or use the arrow keys to move the light, then tap the odd one.

Scoring

  • Your score is the number of finds before the clock runs out.
  • You start with 60 seconds. Every find adds 1 to 2 seconds back; bigger boards give more.
  • Play the Daily for one scored run on the same boards as everyone else, and keep your Unrot streak alive.

Tips

  • Don’t read the tiles one by one. Let your eyes go soft and look at the whole grid: the odd one often jumps out on its own.
  • Check the dot first. It moves when a tile is turned, even by a little.
  • Shade differences are easiest to see from a distance. Lean back.
  • In the dark, sweep in rows, like mowing a lawn, so you don’t cover the same tiles twice.

FAQ

Is Odd One free?

Yes. Odd One is free to play in your browser on desktop and mobile, with no download and no account.

How does Odd One work?

You get a grid of identical symbols, except one. That one is turned a little, is missing a line, or is drawn a shade lighter. Tap it to get the next board. The grid grows from 3×3 to 9×9 and the differences get smaller as you go.

What happens when the lights go out?

From the 10th board the grid goes dark and only a small circle of light shows the tiles. Move your mouse, drag a finger or use the arrow keys to sweep the light around, then tap the odd one out. On a phone, dragging only moves the light, so you never pick a tile by accident.

How does the clock work?

A run starts with 60 seconds. Every find adds 1 to 2 seconds back, more on bigger boards. A wrong tap costs 2 seconds. When the clock hits zero, your score is the number of odd ones you found.

What is the Daily?

Once per day (UTC) everyone gets the same boards. Your first Daily run is scored, and playing any Unrot Daily keeps your Unrot streak going. After that you can practice the same boards as much as you like.

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