Good Old Tetris

Good Old Tetris is the timeless falling-block puzzle. Shapes made of four squares, called tetrominoes, drop one at a time from the top of the well. You move them left and right and rotate them so they land neatly, and every time a horizontal line is completely filled, it disappears and you score points.

Use the left and right arrow keys to move a piece, the up arrow to rotate it and the down arrow to drop it faster. The more lines you clear, the faster the pieces fall, so the game slowly turns from calm puzzle into a test of reflexes. Clearing several lines at once scores far more than one at a time, and the famous four-line clear with the long I-piece is the best move of all. The game is over when the stack reaches the top of the well.

Keep the surface of your stack as flat as possible and leave one column open for the long piece. For a different kind of block puzzle, try Block Blast.

Play Good Old Tetris unblocked and free on Unblocked Games 88 - it runs in any modern browser with no plug-ins, sign-up or install. Go fullscreen with one click, save it to your favourites with the heart button so it is always one tap away, and share your tips or high score in the comments below.