Thanks to @PixelCNinja and Saberman, I’ve learned that Str1der has shown a work-in-progress proof of concept for Shinobi (1989) on the Commodore Amiga 500. While the project began when the developer experimented with recolouring visual assets from the Sega Master System version , he found the updated aesthetic was so compelling that it inspired him to work on this version of Shinobi. Currently,

Source and More information: Shinobi – A proof of concept for the Amiga, as the original version was graphically terrible! [UPDATE]

Author: indieretronews.com