The Dutch electro-artist Legowelt announced a C64-game competition a while ago, and made the soundtrack for the winning game. The game (Loch Ness, pictured above) was never finished, but the soundtrack is available here. Made with the C64’s SID-chip.
Always good to see PETSCII out in the wild like that!
LumASCII (ZX Spectrum) by Bob Smith (2012). It took 9 months to code it, since there weren’t many tools for the Speccy to work with “colour ASCII” (ANSI? hehe). Longplay version here. Thanks to Akira and Ilkkefor the heads up.