Arrange falling blocks (tetrominoes) to fill complete horizontal rows. Completed rows are cleared from the board, earning you points.
Scoring: Clear multiple lines at once for bonus points. Single = 100, Double = 300, Triple = 500, Tetris (4 lines) = 800. Points are multiplied by your current level.
Levels: Every 10 lines cleared advances you one level, increasing the drop speed.
Controls: Arrow keys to move and rotate, Down arrow for soft drop, Space bar for instant hard drop. On mobile, use the on-screen buttons.
Tetris was created by Soviet software engineer Alexey Pajitnov in June 1985 at the Dorodnitsyn Computing Centre in Moscow. The name blends "tetra" (Greek for four, reflecting the four-block pieces) with tennis, Pajitnov's favorite sport. It went on to become the best-selling video game of all time, with over 520 million copies sold across every platform imaginable. The game is so psychologically compelling that scientists coined the term "Tetris Effect" to describe the phenomenon where players see falling blocks in their mind after extended play sessions. Research has shown that playing Tetris can actually thicken the cerebral cortex and improve cognitive efficiency. From the original Game Boy bundling in 1989 to competitive tournaments broadcast globally today, Tetris remains a cultural touchstone that transcends language and age.