Install kspaceduel by entering the following commands in the terminal:
sudo apt update sudo apt install kspaceduel
Description:
SpaceWar! arcade game
KSpaceduel is a space battle game for one or two players, where two ships fly around a star in a struggle to be the only survivor. . This package is part of the KDE games module.
Homepage: http://games.kde.org/
Version: 4:17.12.3-0ubuntu2
Section: universe/games