WarGames (1983) uses what looks like a custom font to display thermonuclear text mode graphics. It was made on a CompuPro 8/16, although an IMSAI 8080 is used in the movie (apparently for sale for $25,000). Read more, see more.
The Macrocom Method is a text mode trick for PC to use 16-colour hi-res graphics in CGA. The principle was to use only the top two pixel rows of each text character, and remove the rest. Image by VileR.
Macrocom was a company that first showed this trick in 1984 with the game ICON. Read more here. h/t: Rowan Lipkovits