AstroMenace is a modern 3D scrolling space shooter with ship upgrade possibilities. You can improve your ship configuration by installing new weapons, defensive systems, power stations and much more. To improve your ship, you must earn money by destroying throngs of enemies on every level. A friendly interface, easy controls, and fancy 3D graphics will bring you straight into the heart of galactic war. Enjoy!.

License: shareware (linux version is free, source is availab)

Additional System Requirements: Runtime dependencies:
libSDL (ver 1.2.6+), libopenal (ver 1.0+), libalut (ver 1.0+), libogg (ver 1.1+), libvorbis (ver 1.1+), libvorbisfile (ver 1.1+), libjpeg (ver 6b+).

Requirements:
Linux OS with 2.6+ kernel.
CPU 1+ GHz, 128 MB RAM, 3D acceleration video card with OpenGL and 32+ MB on board, mouse.
Recommended: sound card