Hehe. Interesting and amusing. I know one easter egg in Vice City, it's a scene from Scarface where Angel (Tony's close friend) gets chopped up with a chain saw. You walk into an apartment/block kind of thing that was an opened door. Then you walk into the bathroom, you will notice many bloody markings along the wall and in the tub. And coincidently you can pick up a chainsaw while you're in there too.