Deca

• Mouse to aim, click to act
• Arrow keys or WASD to move; Space to jump or confirm
• Press Escape or the exit button to leave the full-screen player

1. 1Watch what happens on the first stage carefully; the game teaches its rules through the layout rather than a wall of text.
2. 2Tap or click the object you want to move, then tap its destination. Swipes also work in most tile and block puzzles.
3. 3Look for chain reactions, where one move clears space that makes the next move possible.
4. 4Before using your last move or piece, check the board again for anything you missed.

• Free to play, nothing to install, no account needed
• Loads in the browser tab and opens full screen when you press Play
• Works in portrait or landscape
• Mouse and keyboard controls, with touch support on most devices
• Listed under Puzzles

It costs nothing and asks nothing of you except a few minutes of attention. Deca works well as a mental reset between tasks, and because it runs in the browser with no download you can play on whatever device is nearest. Stages are short enough to stop at any point.

Office workers on a break, students between classes, parents with ten quiet minutes, and anyone who finds matching or sorting things oddly relaxing. Reading ability helps for instructions but is rarely essential.

How long is a typical session of Deca?

As long as you want. Individual stages take a minute or two, and you can stop after one or carry on for an hour. There is no penalty for leaving.

Will the game remember where I got to?

Possibly. Many puzzles store progress in your browser on the device you used. Clearing browser data or switching devices will usually reset it, since there is no account.

Is this suitable for young children?

Most puzzle games are family friendly. The early stages are simple enough for younger kids with a little guidance, though reading the goal may need an adult nearby.