Tetris is a classic tile-matching puzzle game created in 1984 by Alexey Pajitnov. The goal is to arrange falling blocks (called Tetrominoes) into complete horizontal rows. When a row is filled, it disappears, and you earn points. The game gets progressively faster as you advance through levels. Use the arrow keys to move and rotate pieces, and try to clear as many lines as possible before the blocks stack to the top.

The seven standard pieces are: I (cyan, 4×1 line), O (yellow, 2×2 square), T (purple, T-shape), S (green, S-shape), Z (red, Z-shape), J (blue, J-shape), and L (orange, L-shape). Each piece is made of 4 blocks, and together they form all possible arrangements of 4 orthogonally connected squares (tetrominoes).

Single (1 line): 100 × level
Double (2 lines): 300 × level
Triple (3 lines): 500 × level
Tetris (4 lines): 800 × level
Soft Drop: +1 point per row
Hard Drop: +2 points per row
Clearing 4 lines at once (a "Tetris") gives the highest bonus. The level increases every 10 lines cleared, and the dropping speed increases with each level.

1. Keep the stack flat: Avoid creating uneven surfaces. A flat stack gives you more placement options.
2. Leave a well for the I-piece: Keep one column open on the far right or left for clearing Tetrises (4 lines at once).
3. Use hard drop strategically: Hard dropping locks pieces instantly and awards bonus points.
4. Plan ahead: Always watch the "Next" preview to prepare for upcoming pieces.
5. Practice T-spins: Advanced players can rotate the T-piece into tight spaces for extra points.

Yes! Studies have shown that playing Tetris can increase gray matter in the brain, improve spatial reasoning, enhance problem-solving skills, and even help reduce cravings and intrusive memories. The game requires quick thinking, pattern recognition, and strategic planning — all of which provide cognitive benefits. It's often described as a "brain training" activity that's also genuinely fun.

Marathon: Clear a set number of lines (usually 150) to win. Speed increases with each level.
Sprint: Clear 40 lines as fast as possible — a speedrun mode popular in competitive play.
Ultra: Score as many points as possible within a fixed time limit (usually 3 minutes).
Endless: Play until you lose — the mode featured here! The game continues indefinitely with ever-increasing speed.

Tetris was created by Alexey Pajitnov, a Russian computer scientist, in 1984 while he was working at the Dorodnitsyn Computing Centre of the Soviet Academy of Sciences in Moscow. The name "Tetris" combines the Greek prefix "tetra-" (meaning four, since all pieces have 4 blocks) and "tennis" (Pajitnov's favorite sport). It became a global phenomenon after being bundled with the Nintendo Game Boy in 1989.

Absolutely! This online Tetris game is fully responsive and works great on smartphones and tablets. On mobile devices, you'll see dedicated touch buttons below the game board for moving, rotating, and dropping pieces. You can also swipe on the game board itself — swipe left/right to move, swipe down for hard drop, and tap to rotate. No app download required; just play directly in your browser.