A classic Tetris game that runs instantly in your browser—no downloads needed. Playable on both desktop and mobile, it features Classic, Crazy, and Timed modes, along with a global leaderboard. Smooth gameplay makes it enjoyable for players of all kinds. Tetris isn't just retro fun; its fast-paced block rotation sharpens spatial reasoning, working memory, and reflexes. Regular play boosts mental agility, focus, and problem-solving skills, making it a quick daily workout for the brain. Try It Now 👉 [Free Tetris Game](https://onlinetetris.org)