Here's how you can download the Tetris app free for Android devices.
1. Go to the Google Play page for the free app Tetris.
2. Tap the Install button.
Here's a description of Tetris:
"DEVELOP YOUR TETRIS® TOUCH
Slide, rotate, and drop your Tetriminos into place with touchscreen ease.
TRACK YOUR STATS
Know and improve your high score. The more you play, the better you’ll get!
With over 132 million paid downloads on mobile phones, Tetris® is one of the best-selling mobile games ever! This is the real Tetris® game for Android – and it’s FREE!"