Install alien-arena by entering the following commands in the terminal:
sudo apt update sudo apt install alien-arena
Description:
Standalone 3D first person online deathmatch shooter
ALIEN ARENA is a standalone 3D first person online death-match shooter crafted from the original source code of Quake II and Quake III, released by id Software under the GPL license. With features including 32-bit graphics, a new particle engine and effects, light blooms, reflective water, hi-resolution textures and skins, and hi-poly models and stain maps, ALIEN ARENA pushes the envelope of graphical beauty rivaling today's top games. . This package installs the SDL client for Alien Arena.
Homepage: http://red.planetarena.org
Version: 7.66+dfsg-4
Section: multiverse/games