Wolfenstine 3D running on a Commodore 64 with a 16Meg Super CPU, in 16 colour mode. Little slower than 4 colour one, but very cool.
http://scpu.amidog.se/doku.php?id=scpu:wolf3d
http://www.indieretronews.com/2017/05/wolf3d-supercpu-release-of-wolfenstein.html