gtetrinet software package provides multiplayer tetris-like game, 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 gtetrinet
gtetrinet is installed in your system.
Make ensure the gtetrinet package were installed using the commands given below,
$ sudo dpkg-query -l | grep gtetrinet *
You will get with gtetrinet package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | GNOME |
| Package | gtetrinet |
| Version | 0.7.11-3+b3 [armhf], 0.7.11-3+ |
| Description | multiplayer tetris-like game |
| Sub Section | gnome |