ICON: Quest for the Ring (1984) and Seven Spirits of Ra (1987), both by Macrocom, used a tweaked CGA text mode that only displayed the top two pixels of every character. All the art was constructed out of these partial characters.
Here's an interview with the developers: https://www.mobygames.com/featured_article/feature,10/section,37/
@mogwai_poet Ted actually peeked over my shoulder while I was noodling with the game. I asked him to note the graphics, and then I showed him your toot. He was ASTONISHED.
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