Tetris is the puzzle game that has endured for forty years because the core mechanic is essentially perfect. Seven piece shapes fall from the top of the playing field. You rotate and position them to complete horizontal lines. Completed lines disappear. The stack rises if you don't clear lines fast enough.
The learning curve is gentle at first and has no ceiling. Beginners focus on placing pieces without gaps. Intermediate players think one or two pieces ahead. Advanced players read the piece queue several shapes in advance and set up multi-line clears deliberately rather than opportunistically.
Clearing four lines simultaneously with a long piece — the Tetris — delivers a satisfaction that never fully diminishes regardless of how many times you do it. Works on any browser.
Play Tetris and more free browser games at Unblocked Games G+ — no downloads, no logins, works on any school Chromebook.