"Every autumn people start hunting us... We are fed up with it! From now on we'll be armed to the teeth and have parachutes and jet accelerators... So, dear sirs, we'll do hunting our way! These men will regret every single miss because our weapons won't spare them! We'll make the hunt their worst nightmare..." Want to know more? Are you tough enough to stand out against the Jet Ducks?
Dave Gnukem is a 2D scrolling platform game, similar to Duke Nukem 1. It includes a level editor. It runs on Linux and Windows, and uses the SDL library.
Battlemech is a game in which you steer a mech from a top-down view in various arenas. A lot of weapons and powerups are available. It is meant to be played on a LAN, but you can play against bots, too (though the bots don't score). It is based on an advanced version of the Quake engine and written in QuakeC.