Marauder-ah is a set of improvements over "marauder", originally written by Shawn Hargreaves in 1994. You control a spaceship with a basic weapon, and your purpose is to kill as much people as you can. Earning money (using piracy or trade) enables you to upgrade your ship and buy deadly weapons.

License: free

Additional System Requirements: Uses the allegro game programming library. (the included configure script should download and compile it automagically, you'll just have to su and make install)