http://www.theprodukkt.com/downloads/fr-041_debris.zip

180kb executable. Made by the same people who made
.kkrieger, which was a 96kb shooter with amazing lighting
effects (for the time)

http://youtube.com/watch?v=1VqzjafwCNA

Why don't more developers actually make games this way?
And why are there games that are already filling up BRDs?