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21st Concentration, a free online memory game

Programs require a Java enabled browser. With the latest Java 7 Update 51, you may need to add to the "Exception Site List" on the Security Tab of the Java Control Panel and change the security level from "high" to "medium" only if you still have a problem. How To access the Java Control Panel. Click on the Security Tab and move the slider to Medium, this will allow the puzzle applet to load with security prompts. You can also add to the Exception Site List while on this same tab. Click Apply and then click OK. More help
Click on a version below to play

Instructions below

Click on any blue rectangle card (see game above) to uncover picture. With each play you can only turn over two cards. If the images of the two cards match then part of the hidden image is displayed.
Rules: Goal is to match all images. Matching all images will uncover the hidden picture. Game has 12 matches.
About button: To return to game after clicking the about button, click on the center picture.
Start a new game: Click on New Game button starts a new game
The game displays your time working on the game.

Images from 2000-2001

concentration game