This is a clone of what was released for wolfenstein 3D's 20th birthday with minor modifications to remove hard coded paths.
All property is copyright Bethesda and id software. http://wolfenstein.bethsoft.com/
You can play this in your browser using: https://loadx.github.com/html5-wolfenstein3D
p.s If anyone at Bethesda or id software has objections to this being hosted on github please let me know and I will remove it but I assume because Wolfenstein 3D is open source then you won't mind :)