Wolfenstein 3D Sega Megadrive\Genesis - Episode 1 Longplay
A Sega Genesis/MegaDrive version of Wolfenstein 3D was in development by Imagineer (who also produced the Super NES version). Worked on in 1994, with an intended release in September, it was cancelled due to technical problems.
A homebrew version of the game was later released in 2014 by GASEGA68k, and further refined through to 2018