Sumotori Dreams

Sumotori Dreams website

This is amazing. It's a physically simulated sumo wrestling game. You provide simple high-level control signals (walk forward, push, etc.) in order to defeat your opponent, and the wrestlers try to do those actions while maintaining their balance. It's as if they have their own reflexive control systems to stand up straight without falling over, and it works fairly well. It's loads of fun to watch and play. And it's incredibly small... collision detection, physics (with shattering blocks, even), sound effects, music, graphics code (with shadows), textures, etc. all fits in an 87k executable.