Block Stacker - Classic Tetra Puzzle

Block Stacker is a fast, high-performance falling-block puzzle game you can launch instantly from your browser toolbar. Designed for quick sessions and deep high-score runs, it delivers a smooth, distraction-free experience with zero tabs required. Five Unique Ways to Play • Standard Mode: A progressive challenge where the pace gradually increases the longer you survive. • Endless Mode: A fixed-speed environment ideal for practice, experimentation, or relaxed play. • Sand Mode: Placed blocks transform into shifting sand particles, creating a more dynamic and unpredictable experience. • Infected Mode: Face a spreading corruption that expands across the playfield. Clear infected areas before they take over. • Gravity Mode: Experience shifting physics where the playfield direction changes after each placement. Advanced Features & Customization • Instant Popup Play: Click the extension icon and start immediately. No loading screens and no extra tabs. • Stats: Track your performance with statistics including survival time, plays, and personal bests. • Themes: Fully customize the visual experience by creating your own themes or switching between different appearances to match your preference. • Precision Controls: Fully remap all keybinds for fast and responsive gameplay tailored to your preferences. • Play Anywhere: Full offline support and automatic save functionality ensure your progress is always preserved. Why Block Stacker? With support for 35 languages and a focus on clean, modern design, Block Stacker is a complete puzzle experience built for both quick sessions and long runs. Stack smarter, adapt faster, and push your personal best.