A simple tetris implementation—using the HTML5 canvas element—that lets you choose from different modes for selecting the next piece. You might have the most fun with “nice” and “evil”. Also, “autopilot” can be fun to watch. Simply the best free Tetris game on the web; mobile friendly, no adverts and optimised for touch screens and keyboards (iPads, iPhones, Kindles, Android and any HTML5 enabled browser).

Let's Play 'Tetris Friends'
Tetris Friends is a collection of various browser games that offer addictive little spins on everyone's favorite puzzle game. The idea was to log in, play the games, compete with friends, compare scores and badges and buy things. It was a quick, cute go-to place for all your most basic Tetris needs, and had a flavor to suit just about anyone.
What happened?
The games are all based in Flash, and Flash is dying. It's a sad state of affairs, but soon Tetris Friends and its games will be gone forever. Preserving them for future generations to play would be incredibly difficult, because they seem to only load when they detect an online advertisement is running properly before start-up. The games won't blow anyone away, but they still deserve to be preserved.
I have a friend that deeply loves Tetris, and I'll be using their footage while providing commentary about the various games from both an expert and casual player's perspective. Don't expect an emotional rollercoaster, but it should still be enjoyable.
Videos

ABOUT TETRIS®

Tetris® is the addictive puzzle game that started it all, embracing our universal desire to create order out of chaos. The Tetris game was created by Alexey Pajitnov in 1984—the product of Alexey’s computer programming experience and his love of puzzles. In the decades to follow, Tetris became one of the most successful and recognizable video games, appearing on nearly every gaming platform available. This page is the official destination for free online single-player Tetris. Click PLAY to start playing one of the world’s most popular puzzle games now!

OBJECTIVE

The goal of Tetris is to score as many points as possible by clearing horizontal lines of Blocks. The player must rotate, move, and drop the falling Tetriminos inside the Matrix (playing field). Lines are cleared when they are filled with Blocks and have no empty spaces.
As lines are cleared, the level increases and Tetriminos fall faster, making the game progressively more challenging. If the Blocks land above the top of the playing field, the game is over.

CONTROL OPTIONS & SCORES

GENERAL GAMEPLAY INFO

GOAL – Put your organizational skills and endurance to the test by clearing as many lines as possible.

CLEAR LINESFootball mastermind. – Maneuver the falling Tetriminos to fit them together within the Matrix. To clear a line, fill every square within a single row.

SCORE POINTS – Earn points by clearing lines. Clear multiple lines at once to increase your scoring opportunities.

GHOST PIECE – Use the Ghost Piece to determine the best fit for the falling Tetrimino. This helpful guide appears directly below the falling Tetrimino and displays possible placements.

NEXT QUEUE – Preview the upcoming Tetrimino in the Next Queue to plan ahead and increase your scoring opportunities.

HOLD QUEUE – Store a falling Tetrimino in the Hold Queue for later use.

GAME OVER – Stack the Tetriminos too high and the game is over!