geki2 software package provides Xenon-like vertical shootem-up, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install geki2
geki2 is installed in your system.
Make ensure the geki2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep geki2 *
You will get with geki2 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Games |
| Package | geki2 |
| Version | 2.0.3-9 |
| Description | Xenon-like vertical shootem-up |
| Sub Section | Games |