The most impressive technical achivement I've seen in over a decade of
CS314! No use of the fixed-function pipeline, it's all shaders.
Distance field textures, vertex buffers, normal mapping. Full
kinematic simulation with BSP trees for the reactively deforming
terrain.
A fun run with birds and paper airplanes and showers of gold coins!
Sunlight simulation has light moving through the sky and changing
color, for a red sunset by the end of the run. Picking with backbuffer
color. Billboarded background, level of detail rendering for the
trees.
First-person shooter, with great laser lightning/smoke effects, a hyper-caffeinated enemy robot spouting insults, and octree space partitioning for collision.