Believe it or not, Wolfenstein 3D released for the Super Nintendo, but it did so with some pretty significant changes. First of all it was censored: there's no blood, all visual references to Nazism were removed, and Adolf Hitler is known as the Staatmeister. Enemies have fewer sprites, which means that the enemy always faces the player. Oh, and there's additions too: there's a flamethrower and rocket launcher.
Now, thanks to modder AstroCreep, this version of Wolfenstein 3D is available to play on PC. It's not a perfect double: the HUD and a few sound effects are inaccurate, but the experience is otherwise the same (it'll run much better than the SNES version, though). "All sprites and textures have been replaced with SNES counterparts, censorship and all," AstroCreep writes.
To run the mod you'll need the ECWolf source port and a copy of Wolfenstein 3D. Check out the mod here.
...and for the curious, here's footage of the original SNES port (ie, not the mod).