blockout2 software package provides Tetris like game (3D-tetris), you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install blockout2
blockout2 is installed in your system.
Make ensure the blockout2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep blockout2 *
You will get with blockout2 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Games |
| Package | blockout2 |
| Version | 2.4+dfsg1-7+b2 [amd64, arm64, |
| Description | Tetris like game (3D-tetris) |
| Sub Section | Games |