I was watching an old episode of Shovelware Diggers, and the 1988 game Burger Blaster came up. It looks like this game uses composite artifacting for extra colors on top of the standard CGA color palette? Look at all those vertically-banded letters, burger patties, etc.

(Screenshot by Crawly on Mobygames)

I can't find a screenshot of this rendered in composite mode anywhere, and I don't have a copy of this (or even DOSBox) to test right now, but why else would they draw the graphics that way?

I thought there was a thread that listed all the games that use this function on here already... was I imagining that?