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Breast implant ASCII advertising, via
h/t: Lazerbeat
Totem Pole by Joan Stark, July 1997.
Carousel horse by Joan Stark (jgs), 1998.
By The Textmode Exorcist (aka Textorcist) for Acid Trip by Blocktronics, 2013.
TempleOS, a Christian operating system by Terry A. Davis, 2015. It was meant to be the third temple in the Bible. It was mainly a text-mode application, somewhere inbetween DOS and C64, as per instructions from God. Davis suffered from schizophrenia. More @ Wikipedia.
Not sure, but I think the text is in PETSCII?
Archeological maps in ASCII from 1975. A good way of visualizing spatial and other information simultaneously, and obviously a forerunner to both text adventure maps and modern cartography, as noted here.
Also check the typewriter maps, fat font for text-mode infovis & the virus map.
Dwarf Fortress by Zach and Tarn Adams of Bay 12 games, 2006. Part roguelike, part city-building freeware game presented code page 437 ANSI. Also see Wikipedia.
As of 2024, the game is still being updated.