Epic PewPew Batlles of History is a small, quite simple game written in C++ with OpenGL 2.0. You are driving a tank and have to shoot evil killer bunnies that try to destroy the world in their balloons.
The game was written from the ground up (not using a game engine other then OpenGL). It has some interesting features such as procedurally gerenated background mountains, semi-transparant clouds, particle effects, animations, collision detection and more. The entire game was finished in just 2 weeks! You can download binaries below.