Install geki2 by entering the following commands in the terminal:
sudo apt update sudo apt install geki2
Description:
Xenon-like vertical shoot'em-up
Geki 2 is a vertical shoot'em-up game similar to classic arcade games such as Xenon, Target Renegade or Gunhed. It features six levels and two different weapons.
Homepage: http://kxl.orz.hm/
Version: 2.0.3-9build1
Section: universe/games